US Patent & IP Law Firms
U.S. · 19,473 locations
There are 19,473 Patent & IP Law Firms in the US as of September 2026. They are in all 50 states, DC and Puerto Rico. California has the most, with 3,647.
19,948 US patent and IP practices with a street address on 100% of rows and a phone on 99.0%, built from the USPTO's own roster of practitioners licensed to practice before it.
More about this list
Unlike attorneys generally, patent practitioners ARE registered federally, in one place, published in full — which is why this list can be complete in a way no compiled attorney list is. Every row carries how many registered practitioners work at that office and how they split: 29,690 patent attorneys and 7,514 patent agents across the file, with 15,719 single-practitioner shops, 1,787 with two, 1,226 with four to nine and 467 with ten or more, up to 190 at one Irvine office. The attorney/agent split is the distinction that matters in this market — an agent can prosecute an application but cannot litigate — and it tells you what kind of shop you are writing to. firmType separates the 10,502 practices whose name identifies them as a law firm from the 5,291 corporate and institutional in-house IP departments also on the roster. Coverage is all 50 states plus DC, led by California 3,733, Texas 1,777, New York 1,481, Massachusetts 1,071 and Illinois 996.
#Count report
By state
These states add up to 19,470 of the 19,473 locations.
Need just some of them? Ask in your own words.
●Where the rows are
≡Sample Data Preview
| name | address | city | state | zip | phone | firm type | credentials | credentialed staff | solo practice | geo precision | county | county fips | county note | address quality | country | source url | latitude | longitude |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Donald J Lenkszus, P.C. | 5755 W Dewberry Dr | Wasilla | AK | 99623 | (602) 463-2010 | law firm | patent attorney 1 | 1 | no | address | Matanuska-Susitna Borough | 02170 | complete | US | https://oedci.uspto.gov/OEDCI/practitionerSearchEntry | 61.572857 | -149.595404 | |
| Acuity Brands Inc. | 1170 Peachtree Street NE Suite 1200 | Atlanta | GA | 30309 | (800) 922-9641 | corporate or institutional | patent attorney 1 | 1 | no | address | Fulton County | 13121 | complete | US | https://oedci.uspto.gov/OEDCI/practitionerSearchEntry | 33.786331 | -84.383180 | |
| Agios Pharmaceuticals, Inc. | 38 Sidney St. Floor # 2 | Boston | ME | 02116 | (617) 649-8659 | corporate or institutional | patent attorney 1 | 1 | no | complete | US | https://oedci.uspto.gov/OEDCI/practitionerSearchEntry | ||||||
| - Select - | 4 Cloverhill Place | Montclair | NJ | 07042 | (860) 559-7956 | unclassified | patent attorney 1 | 1 | no | address | Essex County | 34013 | complete | US | https://oedci.uspto.gov/OEDCI/practitionerSearchEntry | 40.810768 | -74.210287 | |
| Crafted IP LLC | 5013 S Louise Ave Unit 5133 | Sioux Falls | SD | 57108 | (804) 924-9110 | law firm | patent agent 1 | 1 | no | address | Lincoln County | 46083 | complete | US | https://oedci.uspto.gov/OEDCI/practitionerSearchEntry | 43.500196 | -96.771092 |
{}What's in each row
| Field | What it is | Rows filled |
|---|---|---|
| name | Firm name, as the practitioners themselves report it | 100% |
| firm | What kind of practice this is | 100% |
| credentials | The credential mix at this address, with a count for each | 100% |
| credentialed | How many registry-listed professionals work at this address | 100% |
| solo | yes when the firm trades under a single practitioner's own name; never blank | 100% |
| address | Street address | 100% |
| city | City | 100% |
| state | Two-letter state code | 100% |
| zip | ZIP code | 100% |
| country | Country code | 100% |
| phone | Business phone where published | 99% |
| source | The public registry this row came from | 100% |
| latitude | Latitude | 100% |
| longitude | Longitude | 100% |
| geo_ | How exact the map point is: the source's own point, the street address, or the ZIP code's centre | 100% |
| county | County the location is in | 100% |
| county_ | Five-digit federal code of that county | 100% |
| county_ | How the county was found, where it was not given by the source | 2% |
| address_ | Whether the street address is complete, missing a house number, or a PO box | 100% |
Rows filled is measured on every row of the delivered file.
✓Where this data comes from
Each row names the public source it came from, so any record can be checked against where it was published.
September 15, 2026
File built
19 fields
Columns in the file
Fill measured
On every row of the delivered file
How we build and date every file: methodology.
Using ChatGPT, Claude or an API?
No setup needed. Ask ChatGPT or Claude your question about the US Patent & IP Law Firms and give it this page: it can open https://locationlists.com/find?dataset=patent-law-firm-list with the filters you need and show you the count and price.
Using ChatGPT or Claude? Tell it to answer from locationlists.com/find — no account, no connector.
How assistants ask
No connector needed. Any AI assistant can answer from this site with a web link, no connector, no account: open https://locationlists.com/find with the question as query parameters.
If a question needs filtering, distance, drive time, combining lists or a price, open a /find link: either put the question itself in q=, or build the structured link. The answer does not need an API, a connector or an account.
Simplest, the question itself: https://locationlists.com/find?q=<the question in plain words>
Or set the parts yourself: https://locationlists.com/find?dataset=<slug>&state=<ST>&city=<city>&county=<county>&zip=<zip>&near=<place or zip>&radius=<miles>&drive=<minutes>&where=<column>:<op>:<value>&total=<rows>
Leave out what the question does not need. Use radius for straight-line miles or drive for minutes of driving (5 to 60), not both; near can name several places separated by | to reach from any of them. To ask about several lists at once, use datasets with two or more names, or category with a kind of business. To compare two lists, add relate=nearest and the other list with b. in front of its parameters. To count by area, use areas=county (or zip, state, metro). To keep only places whose county, ZIP code, metro area or state meets a Census figure, add area_where (for example county:population>1000000); with areas, per=100000 gives counts per 100,000 residents.
Links an assistant can open, each showing how many rows match, a few preview rows and the price for just that part:
- The whole list: add a city, state, ZIP code or distance:
https://locationlists.com/find?dataset=patent-law-firm-list
Optional: connect for repeat use or wallet payments:
Read https://locationlists.com/skill.md and follow the instructions to connect LocationLists. Then show me the US Patent & IP Law Firms list.Your assistant will walk you through setup and show you the price before you pay.
For developers
Every step below has a no-connector equivalent: https://locationlists.com/find?dataset=patent-law-firm-list with the same filters as query parameters.
- Connect your agent to
https://locationlists.com/mcp(no key, no signup). - Call
count_locationswithdataset: "patent-law-firm-list"and any filter — it is free, and returns how many rows match and what they cost. - Fetch the rows with
query_locations: $0.72 per 100 rows from this dataset. Above 9,737 rows, buying the whole file is cheaper.
Paid in USDC over x402 — the agent gets an HTTP 402 with the exact price, signs, and retries. Money moves only after rows are delivered, so a failed or empty query costs nothing. Setup for Claude, Cursor and VS Code
?Frequently Asked Questions
How many Patent & IP Law Firms are there in the US?
There are 19,473 Patent & IP Law Firms in the US as of September 2026. They are in all 50 states, DC and Puerto Rico. California has the most, with 3,647.
Is this all law firms, or only patent ones?
Only patent and IP. It comes from the USPTO's register of practitioners admitted to practice before it, so a general litigation or family firm is not here. That narrowness is the point: patent practice is the one slice of the profession with a complete, official, national register, so this list can be genuinely complete where a national attorney list cannot be.
What does firmType actually tell me, and how reliable is it?
It is a NAME rule, and we would rather say so than dress it up. The USPTO roster has no field distinguishing an outside firm from a corporation's in-house IP department, and both are on it. So firmType reads the organization's own name: 10,502 carry an unambiguous legal marker, 5,291 carry an unambiguous corporate or institutional one, and 4,155 are left unclassified rather than guessed at — that bucket includes well-known firms whose names settle nothing, such as Jones Day, Wilson Sonsini Goodrich & Rosati and Norton Rose Fulbright. If in-house departments are the target rather than the exclusion, that is a supported use of the column too.
What is the difference between a patent attorney and a patent agent?
Both passed the USPTO's registration examination and can prosecute patent applications. Only the attorney is also admitted to a state bar and can give legal advice, litigate, or handle trademarks and licensing. A firm staffed only by agents — 3,350 of them here — is a prosecution shop, which is a different buyer from a full-service IP firm.
Why is there no website column?
Because the USPTO roster does not publish one, and shipping an empty column would read as missing data rather than as a field the source does not have. Every column in this file is populated.
How is one office written twenty different ways handled?
By merging on the building rather than the address string. Practitioners type their own address, and one Minneapolis firm's single office appeared as "1600 TCF Tower 121 South 8th Street", "121 South 8th Street Suite 1600", "121 S. Eighth Street #1600" and seventeen more. Keyed literally, that office becomes twenty rows and the staff count is destroyed; keyed on house number and street name it is one row of 91. The same pass corrects self-reported state errors — Foley & Lardner's Milwaukee office is filed under both MI and WI — by taking the majority state at each address.
Who is missing?
14,437 practitioners on the roster list no firm and are registered at a personal address. Those are dropped rather than published under an individual's name, so a solo patent attorney working from home is not in this file. Practitioners outside the US are also excluded.