#1Deborah H. Barnette
Serves this area from Simi Valley, CA (1 mi)
Patent Attorneys & Agents in Simi Valley, CA
The top-ranked patent attorneys and agents serving Simi Valley, CA are Deborah H. Barnette, Michael A. Marcelli (Marcelli Law Office, A Professional Law Corporation) and Jonathan J. Cohen. We list 1709 patent attorneys and agents serving Simi Valley, CA. 30 of the providers shown match an active record from U.S. Patent and Trademark Office, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Patent Attorneys & Agents serving Simi Valley, CA (Ventura County). 1709 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked patent attorneys and agents for Simi Valley
#2Michael A. Marcelli (Marcelli Law Office, A Professional Law Corporation)
Serves this area from Simi Valley, CA (1 mi)#3Jonathan J. Cohen
Serves this area from CA#4Ken B Dallara
Serves this area from CA#5Paul D Chancellor (Ocean Law)
Serves this area from CA#6Paul Hilary Kovelman
Serves this area from CA#7Richard S Erbe (The Law Office Of Richard S Erbe)
Serves this area from CA#8Akshay S Chakravarthy
Serves this area from Oak Park, CA (6 mi)#9Izzat H Izzat
Serves this area from Oak Park, CA (6 mi)#10Liana Guo Bates
Serves this area from Oak Park, CA (6 mi)
20 more providers serving this area
- Minda S Wilson, Oak Park, CA (6 mi)
- Stephen C Hansen, Oak Park, CA (6 mi)
- Steven Andrew Bowers, Oak Park, CA (6 mi)
- Angelo J Gaz (SoCal IP Law Group LLP), Thousand Oaks, CA (7 mi)
- Brian S Tamsut (SoCal IP Law Group LLP), Thousand Oaks, CA (7 mi)
- Christopher J Dugger (SoCal IP Law Group), Thousand Oaks, CA (7 mi)
- Christopher M. Ray, Thousand Oaks, CA (7 mi)
- Colin P Abrahams (Law Office Of Colin P Abrahams), Thousand Oaks, CA (7 mi)
- David C Diamond, Los Angeles, CA (7 mi)
- David M Kleiman, Thousand Oaks, CA (7 mi)
- Gregory Alexander Piccionelli (Gregory A. Piccionelli,), Thousand Oaks, CA (7 mi)
- Henry P Wu (Westlake IP), Thousand Oaks, CA (7 mi)
- John E Gunther (SoCal IP Law Group, LLP), Thousand Oaks, CA (7 mi)
- John Joseph Posta Jr, Thousand Oaks, CA (7 mi)
- Jonathan B Orlick, Los Angeles, CA (7 mi)
- Jonathan Parker Pearce (SoCal IP Law Group LLP), Thousand Oaks, CA (7 mi)
- Jonathan P Gutierrez (SoCal IP Law Group LLC), Thousand Oaks, CA (7 mi)
- Karol Michele Pessin, Thousand Oaks, CA (7 mi)
- Marc G. Martino, Thousand Oaks, CA (7 mi)
- Mark Andrew Goldstein (SoCal IP Law Group LLP), Thousand Oaks, CA (7 mi)
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Frequently asked questions
How many patent attorneys and agents serve Simi Valley?
We list 1709 patent attorneys and agents serving Simi Valley, CA: 0 based there and 1709 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which patent attorneys and agents serve Simi Valley?
The top-ranked patent attorneys and agents serving Simi Valley, CA are Deborah H. Barnette, Michael A. Marcelli (Marcelli Law Office, A Professional Law Corporation), Jonathan J. Cohen, Ken B Dallara and Paul D Chancellor (Ocean Law). The full ranked list, with the official records each provider matched, is on this page.
Which patent attorneys and agents serving Simi Valley are verified against official records?
10 of the top 10 match an active official record: Deborah H. Barnette (U.S. Patent and Trademark Office), Michael A. Marcelli (Marcelli Law Office, A Professional Law Corporation) (U.S. Patent and Trademark Office), Jonathan J. Cohen (U.S. Patent and Trademark Office), Ken B Dallara (U.S. Patent and Trademark Office) and Paul D Chancellor (Ocean Law) (U.S. Patent and Trademark Office), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What is the difference between a patent attorney and a patent agent?
Both are registered with the USPTO to prepare and prosecute patent applications. Patent attorneys are also licensed lawyers and can handle litigation and other legal matters; agents cannot.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .