# US Patent & IP Law Firms — U.S. location dataset

All 19,473 locations in the U.S., as one CSV: 19 fields per record, 52 states, file built September 15, 2026. $69 one-time, with up to 10 real rows free before you buy.

Canonical URL: https://locationlists.com/data/patent-law-firm-list

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. 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.

## The figures

- Records: 19,473 locations (19,469 US)
- States: 52
- Coverage: U.S.
- Fields: 19
- Price: $69 one-time, CSV download, commercial license (https://locationlists.com/license)
- File built on September 15, 2026. Not on an automatic refresh schedule.
- File last modified: 2026-09-15

The file has all 19,473 locations across 52 states in one download. Building the same list by searching one area at a time tends to miss places, and a missed place looks like a gap in coverage that is not really there.

## Fields

- `name`: Firm name, as the practitioners themselves report it
- `firmType`: What kind of practice this is
- `credentials`: The credential mix at this address, with a count for each
- `credentialedStaff`: How many registry-listed professionals work at this address
- `soloPractice`: yes when the firm trades under a single practitioner's own name; never blank
- `address`: Street address
- `city`: City
- `state`: Two-letter state code
- `zip`: ZIP code
- `country`: Country code
- `phone`: Business phone where published
- `sourceUrl`: The public registry this row came from
- `latitude`
- `longitude`
- `geo_precision`
- `county`: County, where the source publishes it
- `county_fips`
- `county_note`
- `address_quality`

## What we did to this data

Merged 475 duplicate listings, unified 165 city spellings, corrected 232 misspelled city names, fixed 6 doubled addresses, added coordinates to 19,369 listings, added the county to 19,369 listings, flagged 1,698 incomplete addresses and measured 19,473 rows. Rebuilt September 15, 2026 from oedci.uspto.gov.

## How complete the key fields are

phone 99%, street address 100%, city 100%, state 100%, ZIP code 100%, latitude 100%, longitude 100%. 18 of 19 columns are filled on at least half the rows.

## Ask this list a question with a link

No connector and no account; each link answers with the matching count, 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)

## The same dataset, for machines

- Record as JSON: https://locationlists.com/data/patent-law-firm-list/dataset.json
- Free sample, up to 10 real rows: https://locationlists.com/data/patent-law-firm-list/sample.csv or https://locationlists.com/data/patent-law-firm-list/sample.json
- Buy link (opens Stripe Checkout): https://locationlists.com/data/patent-law-firm-list/buy

## Questions

### 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.

### How is this data cleaned?

Every rebuild runs the same steps and counts what each one changed. For the current file, rebuilt September 15, 2026 from oedci.uspto.gov: Merged 475 duplicate listings that had the same business name, street address and ZIP code, keeping every filled-in detail from both (September 15, 2026). Unified 165 city names written more than one way within the same ZIP code (for example with and without a space or an abbreviation) to the US Census Bureau spelling (September 15, 2026). Corrected 232 misspelled city names to the US Census Bureau place name for their ZIP code (September 15, 2026). Removed the second copy of 6 street addresses that were typed twice in the same field (September 15, 2026). Added map coordinates to 19,369 listings that had none, from the US Census Bureau address geocoder or, where the street address could not be matched, the centre of the ZIP code (September 15, 2026). Set the county and its federal county code on 19,369 listings, matched to the US Census Bureau county list from the county the source records, the listing's map point, or its ZIP code area (September 15, 2026). Checked every map point against the state in its address and re-placed 0 points that fell outside that state (September 15, 2026). Flagged 1,698 addresses that are incomplete, a PO box, or missing a house number, in an address quality column (September 15, 2026). Checked that the row count, state count and field completeness published for this file were measured from the file itself (September 15, 2026).

### Isn't this free on oedci.uspto.gov?

The underlying records are public on oedci.uspto.gov. What you pay for is the work between that public release and this file: merged 475 duplicate listings, unified 165 city spellings, corrected 232 misspelled city names, fixed 6 doubled addresses, added coordinates to 19,369 listings, added the county to 19,369 listings, flagged 1,698 incomplete addresses and measured 19,473 rows. The current file was rebuilt September 15, 2026 from oedci.uspto.gov. Doing it yourself means downloading the full release, repeating each of those steps, and repeating them again every time the source updates.

### How complete is each field?

Measured on every row of the current file, the share of rows that carry each key field: phone 99%, street address 100%, city 100%, state 100%, ZIP code 100%, latitude 100%, longitude 100%. 18 of 19 columns are filled on at least half the rows.