Research Our Records

U.S. Patent and Trademark Office Records at the National Archives at Kansas City

Patent Office records may be accessed by ordering reproductions for a fee or viewed by appointment at the National Archives at Kansas City.

Patent Office records are contained in Record Group 241, Records of the Patent and Trademark Office.  Additional patent records are accessioned into the holdings of the National Archives each year.  There are currently over four and a half million patent case files and associated records held by the National Archives at Kansas City.

Patent Case File Record Series

Associated Patent Record Series

Patent Record Requests              

Please provide as much of the following information as possible:

  • Patent Number
  • Inventor or case parties
  • Title of patent
  • Date patent was issued or date of case

Please gather as much of this information as possible, and contact staff with additional questions utilizing the contact information listed below.


How to Submit Requests

We receive requests by e-mail or postal mail.

  • E-mail:
  • Postal mail: 
    National Archives at Kansas City
    400 W. Pershing Rd.
    Kansas City, MO 64108

How to Request Patent Records for Use On-Site

The National Archives at Kansas City provides on-site access to patent records to researchers in our research room. Appointments are required to view the materials as they must be retrieved from an off-site storage location.

Researchers must submit a request at least two business days in advance of their desired appointment. Our research room is open Monday-Friday, 8 a.m. – 4 p.m. We are closed Saturday, Sunday, and all Federal holidays.  If you are unable to travel to Kansas City, you may hire a local researcher.

In addition to making copies using our self-service photocopier, researchers are also permitted to make digital images of the records using their personal cameras and scanning equipment following NARA guidelines.

Patent records created in the nineteenth and early twentieth centuries are often trifolded. Occasionally we may need to perform preservation work on documents before they are available for research.  As a result, there may be delays in accessing records, as they are prepared for safe handling.

Research and Reproduction Fees

Note: The National Archives at Kansas City accepts credit cards, checks, or money order as payment for services rendered.


Mail Order Services

Archives Produced Reproductions Fee
Minimum mail order (includes the first 25 pages of reproduction) $20.00
Individual pages - digital or paper $0.80 per copy

Patent records that exceed 400 pages will not be reproduced in full for researchers. National Archives staff can assist researchers with refining their search. You may also decide to hire an on-site researcher on your behalf.


On-Site Service

Self-service Product/Service* Fee
Self-service paper to paper copy $0.25 per copy
Self-service paper to digital copy $0.25 per copy

*These are copies made using the copy machine provided in the research room


Patrons are invited to bring their own digital camera or flatbed scanner to make digital reproductions of archival materials. Please contact us prior to arrival to ensure that your equipment is approved. Wand scanners and form feed scanners are not permitted.