USPTO Patent Assignments Scraper: Owners, Reel/Frame & Patents

Here is one real result, with every field the actor returns:

{
  "reelNumber": 64575,
  "frameNumber": 117,
  "reelFrame": "64575/117",
  "conveyanceText": "ASSIGNMENT OF ASSIGNOR'S INTEREST",
  "conveyanceCode": 23,
  "recordedDate": "08/14/2023",
  "mailDate": "08/15/2023",
  "receiptDate": "08/14/2023",
  "executionDate": "06/26/2023",
  "pageCount": 5,
  "attorneyDocketNumber": "P202204837US01",
  "assignorCount": 5,
  "assignorNames": ["SUNG, MIN GYU", "KRISHNAN, RISHIKESH", "STUCKERT, ERIN", "LOUBET, NICOLAS JEAN", "FROUGIER, JULIEN"],
  "assignorNamesText": "SUNG, MIN GYU; KRISHNAN, RISHIKESH; STUCKERT, ERIN; LOUBET, NICOLAS JEAN; FROUGIER, JULIEN",
  "assigneeCount": 1,
  "assigneeNames": ["IBM CORPORATION - PATENT CENTER"],
  "assigneeNamesText": "IBM CORPORATION - PATENT CENTER",
  "assigneeName": "IBM CORPORATION - PATENT CENTER",
  "assigneeAddressLine1": "1701 NORTH STREET",
  "assigneeAddressLine2": "B/256-3",
  "assigneeCity": "ENDICOTT",
  "assigneeState": "NEW YORK",
  "assigneeZip": "13760",
  "assigneeCountry": "UNITED STATES",
  "propertyCount": 1,
  "patentNumbers": [],
  "applicationNumbers": ["18342821"],
  "publicationNumbers": ["US20250006788A1"],
  "topInventionTitle": "NANOSHEET HEIGHT CONTROL WITH DENSE OXIDE SHALLOW TRENCH ISOLATION",
  "correspondentName": "IBM CORPORATION - PATENT CENTER",
  "imageUrl": "https://assignmentcenter.uspto.gov/ipas/search/api/v3/public/download/patent/64575/117",
  "searchBy": "assigneeName",
  "searchValue": "IBM",
  "source": "USPTO Patent Assignment Search",
  "observedAt": "2026-08-10T00:33:59.545Z"
}

The most complete USPTO patent assignment scraper available. It returns every field the USPTO assignment record exposes for each ownership transfer, including assignors and assignees, the assignee company address, conveyance type and code, execution / recorded / mail / receipt dates, reel and frame, page count, correspondent, and the assigned patent, application and publication numbers, and gives you seven search fields plus date and conveyance filters to target exactly the assignments you need.

📥 Input · 📤 Output · 💰 Pricing · ▶️ Examples

Table of contents

• What it does
• Quickstart
• Input reference
• Output reference
• Example output record
• Run via API and CLI
• Fetch results
• Billing and limits
• FAQ and troubleshooting

What it does

The actor searches the USPTO Patent Assignment record by the field you choose (assignee, assignor, patent, application, publication, reel/frame, or correspondent), applies the date and conveyance filters, and writes one normalized record per assignment to the run's dataset. Each value in searchValues runs a separate search and results are combined. When fetchDetails is enabled (default), each assignment is enriched with the full assignee company address, correspondent, and the list of assigned patent / application / publication numbers.

Dates are returned in the source MM/DD/YYYY format (for example 08/14/2023), name lists are provided both as arrays and as a single joined string, and missing source values are returned as null or an empty array.

Quickstart

Open the actor, paste this into the input, and press Run. It returns up to 8 assignments recorded to IBM between 2020 and 2023.

{
  "searchBy": "assigneeName",
  "searchValues": ["IBM"],
  "fetchDetails": true,
  "maxAssignments": 8,
  "recordedDateFrom": "2020-01-01",
  "recordedDateTo": "2023-12-31",
  "conveyanceContains": "assignment"
}

Change searchBy to search by patent number, reel/frame, and so on. Default maxAssignments is 50.

Input reference

Field	Type	Required	Default	Description
searchBy	enum	no	assigneeName	Which field the search values are matched against. One of assigneeName (current / new owner), assignorName (previous owner), patentNumber, applicationNumber, publicationNumber, reelFrame (for example 74685/126), correspondentName.
searchValues	string[]	no	["IBM"]	Values to search for using the chosen field (for example company names like IBM, Google, or patent numbers). Each value runs a separate search and results are combined.
fetchDetails	boolean	no	true	When enabled, each assignment is enriched with the full assignee company address, correspondent and the list of assigned patent / application numbers. Disable for a faster, summary-only run.
maxAssignments	integer	no	50	Maximum number of assignment records to collect across all searches. Minimum 1, maximum 1000000.
recordedDateFrom	string	no	(empty)	Only keep assignments recorded on or after this date (YYYY-MM-DD).
recordedDateTo	string	no	(empty)	Only keep assignments recorded on or before this date (YYYY-MM-DD).
conveyanceContains	string	no	(empty)	Only keep assignments whose conveyance text contains this phrase (case-insensitive), for example assignment, merger, security, name change.

Output reference

One dataset item per assignment. Types: string, integer, string[], or null / empty array when the source value is absent.

Field	Type	Description
reelNumber	integer	Reel number.
frameNumber	integer	Frame number.
reelFrame	string	Reel/Frame identifier (for example 64575/117).
conveyanceText	string	Conveyance type (assignment, merger, security interest, name change and so on).
conveyanceCode	integer	Conveyance type code.
recordedDate	string	Date the assignment was recorded (MM/DD/YYYY).
mailDate	string	Mail date (MM/DD/YYYY).
receiptDate	string	Receipt date (MM/DD/YYYY).
executionDate	string	Assignor execution date (MM/DD/YYYY).
pageCount	integer	Document page count.
attorneyDocketNumber	string	Attorney docket number, or null.
assignorCount	integer	Number of assignors.
assignorNames	string[]	Assignor (previous owner) names.
assignorNamesText	string	Assignor names joined into one string.
assigneeCount	integer	Number of assignees.
assigneeNames	string[]	All assignee (new owner) names.
assigneeNamesText	string	All assignee names joined into one string.
assigneeName	string	Primary assignee name.
assigneeAddressLine1	string	Assignee address line 1.
assigneeAddressLine2	string	Assignee address line 2, or null.
assigneeCity	string	Assignee city.
assigneeState	string	Assignee state.
assigneeZip	string	Assignee ZIP / postal code.
assigneeCountry	string	Assignee country.
propertyCount	integer	Number of assigned properties (patents / applications).
patentNumbers	string[]	Assigned patent numbers.
applicationNumbers	string[]	Assigned application numbers.
publicationNumbers	string[]	Assigned publication numbers.
topInventionTitle	string	Title of the first assigned property.
correspondentName	string	Correspondent name.
imageUrl	string	Recorded document image URL.
searchBy	string	Field searched.
searchValue	string	Search value that produced this record.
source	string	Data source.
observedAt	string	ISO 8601 timestamp of when the record was collected.

The address, correspondent and assigned-property fields are populated only when fetchDetails is enabled. On a failed run, the actor writes a single item with a populated error field instead, and does not charge for it.

Example output record

Real record from a live run (input {"searchBy": "assigneeName", "searchValues": ["IBM"], "fetchDetails": true, "maxAssignments": 8, "recordedDateFrom": "2020-01-01", "recordedDateTo": "2023-12-31", "conveyanceContains": "assignment"}):

{
  "reelNumber": 64575,
  "frameNumber": 117,
  "reelFrame": "64575/117",
  "conveyanceText": "ASSIGNMENT OF ASSIGNOR'S INTEREST",
  "conveyanceCode": 23,
  "recordedDate": "08/14/2023",
  "mailDate": "08/15/2023",
  "receiptDate": "08/14/2023",
  "executionDate": "06/26/2023",
  "pageCount": 5,
  "attorneyDocketNumber": "P202204837US01",
  "assignorCount": 5,
  "assignorNames": ["SUNG, MIN GYU", "KRISHNAN, RISHIKESH", "STUCKERT, ERIN", "LOUBET, NICOLAS JEAN", "FROUGIER, JULIEN"],
  "assignorNamesText": "SUNG, MIN GYU; KRISHNAN, RISHIKESH; STUCKERT, ERIN; LOUBET, NICOLAS JEAN; FROUGIER, JULIEN",
  "assigneeCount": 1,
  "assigneeNames": ["IBM CORPORATION - PATENT CENTER"],
  "assigneeNamesText": "IBM CORPORATION - PATENT CENTER",
  "assigneeName": "IBM CORPORATION - PATENT CENTER",
  "assigneeAddressLine1": "1701 NORTH STREET",
  "assigneeAddressLine2": "B/256-3",
  "assigneeCity": "ENDICOTT",
  "assigneeState": "NEW YORK",
  "assigneeZip": "13760",
  "assigneeCountry": "UNITED STATES",
  "propertyCount": 1,
  "patentNumbers": [],
  "applicationNumbers": ["18342821"],
  "publicationNumbers": ["US20250006788A1"],
  "topInventionTitle": "NANOSHEET HEIGHT CONTROL WITH DENSE OXIDE SHALLOW TRENCH ISOLATION",
  "correspondentName": "IBM CORPORATION - PATENT CENTER",
  "imageUrl": "https://assignmentcenter.uspto.gov/ipas/search/api/v3/public/download/patent/64575/117",
  "searchBy": "assigneeName",
  "searchValue": "IBM",
  "source": "USPTO Patent Assignment Search",
  "observedAt": "2026-08-10T00:33:59.545Z"
}

Run via API and CLI

Start a run and wait for it to finish, then read the dataset. Replace <TOKEN> with your Apify API token.

Run synchronously and get dataset items in one call:

curl -X POST "https://api.apify.com/v2/acts/scrapers_lat~uspto-patent-assignments-scraper/run-sync-get-dataset-items?token=<TOKEN>" \
  -H "Content-Type: application/json" \
  -d '{"searchBy":"assigneeName","searchValues":["IBM"],"maxAssignments":25}'

Start a run asynchronously (search by patent number):

curl -X POST "https://api.apify.com/v2/acts/scrapers_lat~uspto-patent-assignments-scraper/runs?token=<TOKEN>" \
  -H "Content-Type: application/json" \
  -d '{"searchBy":"patentNumber","searchValues":["10000000"],"fetchDetails":true,"maxAssignments":50}'

Apify CLI:

apify call scrapers_lat/uspto-patent-assignments-scraper \
  --input '{"searchBy":"reelFrame","searchValues":["64575/117"]}'

Fetch results

Every run writes to a dataset. Fetch items as JSON, CSV, or Excel by changing format:

# JSON
curl "https://api.apify.com/v2/datasets/<DATASET_ID>/items?token=<TOKEN>&clean=true&format=json"

# CSV
curl "https://api.apify.com/v2/datasets/<DATASET_ID>/items?token=<TOKEN>&clean=true&format=csv"

# Paginate large datasets
curl "https://api.apify.com/v2/datasets/<DATASET_ID>/items?token=<TOKEN>&offset=1000&limit=1000"

<DATASET_ID> is returned as defaultDatasetId in the run object. Use offset and limit to page through large result sets. clean=true drops empty and internal fields.

Billing and limits

• Pay per result. You are charged per record returned (result event). See the pricing tab for the current per-result price.
• No charge on failure. If a run errors, the actor writes a single item with a populated error field and does not charge for it. Empty runs cost nothing.
• Spend cap respected. Set maxTotalChargeUsd on the run; once reached, the actor stops emitting and charging further billable results.
• Free Apify plans are capped at 10 records per run. Upgrade for higher maxAssignments.

FAQ and troubleshooting

A run returned 0 records. Why? The search value matched no assignments in the chosen field, or the date / conveyance filter excluded them all. Confirm the search value and searchBy pairing (for example a patent number needs searchBy: patentNumber), then loosen the filters. Zero-result runs are not charged.

Why are dates formatted as MM/DD/YYYY? That is the exact format the USPTO assignment record publishes. Values are returned verbatim rather than reformatted.

Why is patentNumbers empty when applicationNumbers is not? Many assignments cover applications that have not yet granted, so only application and publication numbers are present. Missing source values are returned as empty arrays or null, never invented.

What does fetchDetails change? With it off, you get the summary assignment record fast. With it on (default), each record is enriched with the assignee address, correspondent, and the full list of assigned patent / application / publication numbers.

Can I search several companies or patents at once? Yes. Pass multiple entries in searchValues; each runs a separate search using the same searchBy field and results are combined up to maxAssignments.

Is this an official USPTO tool? No. This actor is independent and has no affiliation with the USPTO. It reads only data that is publicly available through the USPTO Patent Assignment Search. Use it in accordance with the USPTO's terms of service.

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Independent tool, not affiliated with the USPTO. Accesses only publicly available USPTO Patent Assignment Search data. Use in accordance with the USPTO's terms of service.