California Intellectual Property Lawyer | Leeran S. Barzilai, APLC
Protect your inventions, brand, and creative works anywhere in California. Trust California intellectual property lawyer Leeran S. Barzilai for patents, trademarks, copyrights, and trade secrets. Free consultation statewide.
Your ideas, inventions, and brand identity are among your most valuable assets. Whether you are a startup founder in Silicon Valley, a content creator in Los Angeles, or an agtech innovator in the Central Valley, protecting your intellectual property is essential to your success. At Leeran S. Barzilai, A Prof. Law Corp. , we help individuals and businesses throughout California secure, enforce, and defend their IP rights.
The intellectual property landscape is rapidly evolving. New 2026 laws, including California’s Assembly Bill 316 , have changed the rules for artificial intelligence, patent eligibility, and brand protection. An experienced California intellectual property lawyer stays current with these developments and helps you navigate the complex intersection of federal and state IP law.
Why You Need a California Intellectual Property Lawyer
Intellectual property law involves complex federal statutes, specialized agency procedures, and rapidly evolving case law. Understanding these nuances is essential for protecting your competitive advantage.
Patents Protect Inventions: A utility patent gives you the right to exclude others from making, using, or selling your invention for 20 years . Design patents protect the unique appearance of products. Under new USPTO guidance , patent eligibility for software and AI-assisted inventions requires demonstrating “significant human contribution” . Working with a knowledgeable attorney ensures your application meets these heightened standards.
Trademarks Safeguard Your Brand: Your brand name, logo, and slogans distinguish you from competitors. Federal trademark registration with the USPTO provides nationwide protection and valuable legal presumptions . A registered patent attorney can conduct clearance searches to avoid conflicts and navigate the registration process .
Copyrights Protect Creative Expression: Copyright law protects original works of authorship—from software code and website content to photographs, music, and films. Registration with the U.S. Copyright Office is required before filing an infringement lawsuit and can entitle you to statutory damages.
Trade Secrets Require Vigilance: Unlike patents, trade secrets last as long as they remain confidential . However, once disclosed, rights are lost forever. We help you implement non-disclosure agreements, employee exit procedures, and security protocols to maintain secrecy.
2026 Brings Major Changes: California’s AB 316 , effective January 1, 2026, eliminates the “autonomous AI” defense in civil actions . Defendants who “developed, modified, or used” an AI system can no longer argue that “the artificial intelligence autonomously caused the harm.” This has significant implications for AI developers and deployers across all industries.
Where We Serve: All Major California Innovation Centers
We represent IP clients throughout the Golden State. Our firm has experience handling matters in every major innovation hub. Consequently, we understand local industries, federal district courts, and the unique challenges facing creators in different regions.
Los Angeles County: From Silicon Beach startups to entertainment industry giants, LA requires sophisticated IP counsel. We represent clients at the Central District of California federal courthouses in Los Angeles and Santa Ana. Our team understands the unique needs of technology, media, and manufacturing companies .
San Diego County: Our home base at 4501 Mission Bay Dr, Ste 3C puts us minutes from the Southern District of California federal courthouse. We serve innovators throughout San Diego County, from biotech firms in Sorrento Valley to defense contractors and tech startups.
Orange County: We represent clients in Irvine, Newport Beach, and Santa Ana. With numerous IP law firms located in Newport Beach and Irvine , Orange County is a regional IP hub . Our attorneys are familiar with local procedures and the Central District’s Southern Division .
Riverside and San Bernardino: The Inland Empire’s growing logistics and manufacturing sectors need IP protection. We serve clients in Riverside, San Bernardino, and Ontario at the Riverside federal courthouse .
Ventura and Santa Barbara: From Oxnard to Santa Barbara, we handle IP matters along the Central Coast. We understand local industries and courts in Ventura, Thousand Oaks, Simi Valley, and Santa Barbara . Central California IP Representation
Sacramento County: California’s capital city has a growing innovation economy. We represent clients at the Eastern District of California federal courthouse in Sacramento. Our team understands the unique needs of agtech, government contractors, and emerging companies .
Fresno County: The heart of the Central Valley has unique agricultural technology and food processing industries. As noted by Sierra IP Law , the Central Valley requires specialized IP services for agriculture technology, biotechnology, and manufacturing . We serve clients in Fresno, Clovis, and Madera.
Kern County: Bakersfield’s oil, gas, and agriculture sectors need IP protection for proprietary processes and equipment. We help clients throughout Kern County at the Eastern District courthouse in Bakersfield .
San Joaquin Valley: Stockton, Modesto, Tracy, and Lodi have diverse manufacturing and agricultural businesses. We represent innovators throughout the northern San Joaquin Valley .
Tulare County: We serve clients in Visalia, Tulare, and Hanford, where agricultural innovation drives the local economy. Northern California IP Representation
San Francisco: The Bay Area is a global center of innovation and IP litigation. We represent clients at the Northern District of California federal courthouse in San Francisco. Our team understands the unique challenges facing technology companies, life sciences firms, and venture-backed startups .
San Jose and Silicon Valley: Santa Clara County is the heart of the technology world. We represent clients at the Northern District courthouse in San Jose . With patent prosecution, litigation, and portfolio management services, we help technology companies protect their competitive advantage .
Oakland and East Bay: Alameda County has a vibrant innovation community. We represent clients at the Northern District courthouse in Oakland and work with biotech, clean tech, and software companies throughout the East Bay.
Santa Rosa and North Bay: Sonoma, Napa, and Marin counties have thriving wine, food, and sustainable technology industries. We represent clients throughout the North Bay at the Sonoma County Superior Court and in federal court.
Far Northern California: Redding and Shasta County innovators need accessible IP counsel. We travel to serve clients throughout the northernmost regions. Coastal California IP Representation
Santa Barbara: The American Riviera has active technology, biotech, and clean energy sectors. We represent innovators in Santa Barbara, Goleta, and Carpinteria.
Central Coast: Monterey, Santa Cruz, Salinas, and Watsonville have growing research and technology communities. We understand local courts and the unique IP issues facing coastal innovators .
North Coast: Eureka and Humboldt County entrepreneurs need accessible IP support. We travel to serve clients throughout the region.</details>
Comprehensive Intellectual Property Subpages
We provide full-service IP counsel across all major practice areas. Each subpage below provides detailed information tailored to your situation.
Patent Law
California Patent Prosecution Lawyer: Patents are the strongest form of IP protection for inventions. This subpage covers utility patents (20-year protection for how things work), design patents (15-year protection for how things look), and plant patents. We prepare and prosecute applications before the USPTO , responding to office actions and overcoming rejections .
California Patent Litigation Lawyer: When competitors infringe your patent rights, we enforce them in federal court. This subpage covers patent infringement lawsuits, defense against allegations, and proceedings before the Patent Trial and Appeal Board (PTAB) .
California Software and AI Patent Lawyer: Patent eligibility for software and AI inventions has become more complex. Under new USPTO guidance , applicants must demonstrate “significant human contribution” and link claims to technological improvements . We help technology companies navigate these requirements.
California Provisional Patent Application Lawyer:: A provisional application secures an early filing date while you refine your invention. This subpage covers the benefits of provisional filings, including the 12-month period to file a non-provisional application and the ability to claim “patent pending” status .
Trademark Law
California Trademark Registration Lawyer: Your brand is your promise to customers. Federal registration provides nationwide protection and valuable legal presumptions. This subpage covers trademark searches, application preparation, responding to office actions, and maintaining registrations .
California Trademark Litigation and Opposition Lawyer:: When others infringe your mark or oppose your registration, we protect your rights. This subpage covers proceedings before the Trademark Trial and Appeal Board (TTAB) and federal court litigation for infringement, dilution, and cybersquatting .
California Trade Dress Protection Lawyer: The overall look and feel of your product or packaging may be protectable as trade dress. This subpage covers design patent protection and trade dress rights under the Lanham Act .
Copyright Law
California Copyright Registration Lawyer:: Copyright protects original works of authorship—software, websites, photographs, music, films, and written content. Registration with the U.S. Copyright Office is required before filing an infringement lawsuit. This subpage covers the registration process and best practices for creative businesses .
California Copyright Infringement Lawyer:: When others copy your creative work without permission, we pursue claims for injunctions and damages. This subpage covers proving infringement, fair use defenses, and remedies including statutory damages.
Trade Secret and Unfair Competition Law
California Trade Secret Lawyer:: Confidential business information—customer lists, manufacturing processes, formulas, and algorithms—may be protected as trade secrets. Unlike patents, trade secrets last indefinitely if properly safeguarded. This subpage covers non-disclosure agreements, employee exit procedures, and misappropriation claims .
California Unfair Competition Lawyer:: The Lanham Act and state law prohibit false advertising, trademark infringement, and other unfair business practices. This subpage covers claims against competitors who engage in deceptive conduct .
Key 2026 Intellectual Property Law Updates
California’s intellectual property landscape has changed significantly in 2026. Below are the most important developments.
AB 316 — Elimination of “Autonomous AI” Defense
Effective January 1, 2026, California Assembly Bill 316 prohibits defendants who “developed, modified, or used” an AI system from arguing that “the artificial intelligence autonomously caused the harm” in civil actions . This law responds to arguments like Air Canada’s unsuccessful attempt to characterize its customer service chatbot as a “separate legal entity” responsible for providing inaccurate information.
Key Implications: AB 316 does not create strict liability—defendants may still contest causation, foreseeability, and comparative fault. However, the law applies to the entire AI supply chain: foundation model developers, fine-tuners, integrators, and deployers alike . Organizations using third-party AI tools should review vendor agreements, particularly indemnification provisions and limitation of liability clauses.
USPTO Section 101 Guidance for AI Inventions
In December 2025, the USPTO issued new memoranda addressing how technical evidence can be used in the context of Section 101 rejections . Director John Squires has identified bringing clarity to § 101 as a primary objective, emphasizing the need to reduce inconsistent and confusing eligibility determinations that can hinder innovation.
Practical Impact: For applicants, the guidance provides a practical roadmap for responding to § 101 rejections by linking claim language to technological improvements disclosed in the specification . This is particularly important for software, artificial intelligence, and machine learning inventions .
Federal and State AI Regulation
Recent developments highlight a bifurcating regulatory landscape for AI :
- Federal Retreat: On December 19, 2025, the FTC voted 2-0 to vacate its consent order against an AI writing tool, signaling a shift from “potential harm” to “actual harm” as the threshold for AI enforcement.
- State Advance: States continue advancing AI regulation. Colorado’s AI Act becomes effective February 2026, and California’s Transparency in Frontier AI Act took effect January 2026.
Compliance Takeaway: For AI deployers, federal pullback should not be mistaken for regulatory relief. Compliance obligations are multiplying at the state level .
Trademark Filing Fee Updates
The USPTO implemented new trademark filing fee surcharges in 2025, affecting application strategy and budgeting . Working with counsel who stays current on fee structures and examination procedures ensures cost-effective portfolio management.
Right of Publicity Law Amendments
California amended its right of publicity law in 2025, expanding protections for individuals’ names, voices, and likenesses . This is particularly important for content creators, influencers, and entertainment industry professionals.
The IP Protection Process
Understanding how IP rights are secured helps you plan your strategy.
Initial Assessment: We meet for a free consultation. We evaluate your inventions, brand elements, and creative works. We discuss your business goals and recommend appropriate protection strategies.
Clearance Searches: Before filing, we conduct searches to identify potential conflicts. For patents, this involves prior art searching. For trademarks, we search federal and state databases, common law sources, and domain name registrations .
Application Preparation and Filing: We draft comprehensive applications that meet USPTO requirements. For patents, this includes detailed specifications, claims, and drawings. For trademarks, we identify appropriate classes of goods and services and submit specimens of use.
Office Action Response: The USPTO often issues office actions raising objections or rejections. We prepare substantive responses addressing examiner concerns while preserving broad protection .
Maintenance and Enforcement: After registration, we help you maintain your rights through proper use, timely renewals, and enforcement against infringers. For patents, this includes paying maintenance fees. For trademarks, we monitor for conflicting applications and pursue oppositions when necessary .
Frequently Asked Questions
How much does a California intellectual property lawyer cost? Our fees vary depending on the type and complexity of your matter. We offer transparent fee arrangements, including flat-fee options for trademark registrations and provisional patent applications, and hourly rates for prosecution and litigation. Contact us to discuss your specific needs.
How long does patent protection last? Utility patents expire 20 years from the earliest effective filing date. Design patents expire 15 years from grant. Trademarks can last indefinitely if properly maintained with continued use and timely renewals .
Can I patent an AI algorithm? Yes, but the strategy has shifted. Under new USPTO guidance and the 2026 legal landscape, we focus on how the algorithm improves computer functionality itself—rather than just the mathematical method—and document the “significant human contribution” required .
What is the difference between a patent and a trade secret? A patent gives you a 20-year legal monopoly in exchange for public disclosure. A trade secret (like the Coca-Cola formula) lasts as long as it remains secret . We help you decide which protection fits your specific business model.
Do I need a federal trademark registration? While common law rights arise from use, federal registration provides significant advantages: nationwide constructive use, prima facie evidence of validity, the right to use the ® symbol, and the ability to bring an infringement action in federal court .
What is the “statutory bar” for patents? U.S. law is unforgiving. If you publicly disclose your invention, offer it for sale, or use it commercially before filing, you may trigger a one-year “grace period” clock. In many international jurisdictions, even a single day of public disclosure before filing can result in a complete loss of rights .
How is a registered patent attorney different? A registered patent attorney has passed the USPTO patent bar and is qualified to prepare and prosecute patent applications. Not all intellectual property lawyers are registered patent attorneys. We have the technical and legal qualifications required for patent work .
Contact Your California Intellectual Property Lawyer Today
Your intellectual property is too valuable to leave unprotected. Whether you need a patent application, trademark registration, or defense against infringement claims, experienced counsel makes all the difference.
At Leeran S. Barzilai, A Prof. Law Corp. , we represent innovators throughout California in all intellectual property matters. We offer free consultations. Our team brings technical expertise, legal knowledge, and business acumen to every engagement.
Call 619-436-7544 or email info@lbatlaw.com to schedule your free consultation. Visit https://lbatlaw.com/ for more information. Our office is conveniently located in San Diego. We represent clients statewide. We are ready to protect your ideas, no matter where you are.