Patent Lawyers Email List and registered patent attorney contacts by state

Postal addresses

Is there a patent attorney mailing list with street addresses?

Yes. The patent attorney mailing list gives a full street address, city, state and ZIP code on 100% of records. Email and direct mail draw on the same purchased file, so one order supports a letter, a postcard and an email sequence to each firm.

The USPTO's own practitioner roster leaves email out. Under 37 CFR 11.11(a), each registered practitioner reports an office postal address, a business phone and between 1 and 3 email addresses to the Office of Enrollment and Discipline, yet the list the Office publishes holds only name, postal business address, business phone, registration number and attorney or agent status. A purchased file adds a verified email column, job title and firm size.

Buyer fit

Why do vendors market to patent law firms?

Patent firms buy docketing software, prior art search tools, annuity payment services and patent drawing services, because every application and issued patent runs on USPTO deadlines. A utility patent lapses, and its rights stop being enforceable, when the maintenance fee and any surcharge go unpaid.

According to the USPTO, maintenance fees fall due 3 to 3.5, 7 to 7.5 and 11 to 11.5 years after a utility patent issues, and a 6-month grace period with a surcharge follows each window. Design and plant patents carry no maintenance fees. Each issued utility patent therefore adds 3 payment dates to a firm's docket.

• Docketing software for office action and maintenance fee dates
• Prior art search databases and patent analytics
• Annuity services that pay renewal fees in other countries
• Drawing and translation services for application drafts

USPTO registration

Registered patent attorney vs patent agent: what is the difference?

A registered patent attorney is a lawyer admitted to a state bar who also holds USPTO registration; a patent agent holds the same USPTO registration without being an attorney. The USPTO roster listed 38,406 patent attorneys and 14,725 patent agents on September 16, 2026.

The USPTO Office of Enrollment and Discipline, OED, gives the registration exam, often called the patent bar: 100 multiple-choice questions in two 3-hour sessions, with 63 of 90 scored questions needed to pass. Rule 37 CFR 11.6(a) registers attorneys as patent attorneys and 11.6(b) registers non-attorneys as patent agents, and an attorney files a certificate of good standing no more than 6 months old to receive the attorney registration.

The USPTO states that patent agents cannot argue patent cases in courts or perform services their local jurisdiction treats as practicing law. This file covers US attorneys, and it reports each one's bar number and bar admission state. Immigration practice runs a comparable federal overlay, because 8 CFR 1292.1(f) makes registration a condition of practice before immigration judges and the Board of Immigration Appeals, covered by the EOIR-registered immigration attorney contacts.