USPTO trademark

CHECKSUM

RegisteredUSPTOWord markClass 9Class 42

"CHECKSUM" is a word mark owned by Checksum AI, Inc., filed at the USPTO on June 17, 2024. It is registered and covers classes 9 and 42.

View Checksum AI, Inc. portfolioGet this data via the API
Official USPTO record
CHECKSUM trademark as filed
As filed with the USPTO
Status
Registered
Since November 18, 2025
Filed
June 17, 2024
Registered
November 18, 2025
Expires
Not recorded
Application no.
98603889
Registration no.
8027222
Office
USPTO
United States Patent and Trademark Office
Mark type
Word mark
2 classes
Ownership

Who owns CHECKSUM

The owner on file, matched to the company behind it. Every owner-name spelling for that company is grouped on its page.

Owner

Checksum AI, Inc.

San Francisco, United States

1 trademarks in the portfolioView company

Representative

Caitlin R. Byczko

Barnes & Thornburg LLP

Goods and services

What the mark covers

The products and services CHECKSUM is filed for, grouped by Nice class.

  • downloadable computer software for code testing; downloadable computer software for code testing, namely for code correction, code auto-healing, code quality and robustness and technical debt reduction

  • software as a service (SAAS) featuring software for code testing; software as a service (SAAS) featuring software for code testing, namely for code correction, code autohealing, code quality and robustness and technical debt reduction

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Notice of registration confirmation emailed
  2. Registered-principal register
  3. Official gazette publication confirmation e-mailed
  4. Published for opposition
  5. Notification of notice of publication e-mailed
  6. Exparte appeal terminated
  7. Approved for pub - principal register
  8. Ex parte appeal-instituted
  9. Jurisdiction restored to examining attorney
  10. Exparte appeal received at ttab

10 earlier steps on the official record.

FAQ

About CHECKSUM

Who owns the trademark "CHECKSUM"?

The USPTO trademark "CHECKSUM" (application 98603889) is owned by Checksum AI, Inc.

What is the status of "CHECKSUM"?

Its status at the USPTO is: registered.

When was "CHECKSUM" registered?

It was registered on November 18, 2025.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull CHECKSUM and marks like it into your own product with one request.

  • GET/v1/trademarks/{id}

    The full record: owners, classes, dates and images

  • GET/v1/trademarks/{id}/events

    Every step in the office history

  • GET/v1/proceedings?trademark_id={id}

    Oppositions and cancellations against the mark

Get API keyView docs
GET /v1/trademarks/{id}
ID=tm_019d2933-5ffd-75fe-ac5a-1fd8f787fe87
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_019d2933-5ffd-75fe-ac5a-1fd8f787fe87",
  "object": "trademark",
  "mark_text": "CHECKSUM",
  "status": {
    "primary": "active",
    "stage": "registered"
  },
  "office_code": "US",
  "application_number": "98603889",
  "filing_date": "2024-06-17",
  "nice_classes": [
    9,
    42
  ],
  "owners": [
    {
      "name": "Checksum AI, Inc.",
      "entity_id": "ent_019eb70b-d086-771a-ba12-046fa5fdea16"
    }
  ]
}