Who owns the CHECKSUM trademark?

The CHECKSUM trademark is owned by Checksum AI, Inc..

What is the serial number for CHECKSUM?

The USPTO serial number for CHECKSUM is 98603889.

What is the registration number for CHECKSUM?

CHECKSUM is registered under USPTO registration number 8027222.

CHE

USPTO Trademark Record

REGISTERED

CHECKSUM

Q: What class is the CHECKSUM trademark registered in?

The CHECKSUM trademark is registered in Class 009 (Electronics, software & scientific instruments), Class 042 (Scientific, technology & SaaS services).

SN 98603889·Reg 8027222·Filed Jun 17, 2024

Owner Checksum AI, Inc.

Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable multimedia files, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus.; Scientific and technological services and research and design relating thereto; industrial analysis, industrial research and industrial design services; quality control and authentication services; design and development of computer hardware and software.

CHECKSUM (Serial No. 98603889), Registration No. 8027222, is a registered US trademark filed on Jun 17, 2024 by Checksum AI, Inc.. This trademark covers Class 009 (Electronics, software & scientific instruments), Class 042 (Scientific, technology & SaaS services).

early section 8: November 18, 2031

Mark Intelligence

CHECKSUM (Reg. #8027222) is a registered US trademark that has been protecting its owner, Checksum AI, Inc., since 2024. The mark covers Class 009 (Electronics, software & scientific instruments) and Class 042 (Scientific, technology & SaaS services) respectively. Goods and services include Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, s.... The mark faced 1 opposition proceeding during prosecution.

FILED

Jun 17, 2024

SERIAL

98603889

REG#

8027222

REGISTERED

Nov 18, 2025

Owner

Applicant

Checksum AI, Inc.

Entity

Corporation

State

Address

140 New Montgomery Street, 4th Floor, San Francisco, CA, 94105

Country

Attorney

NameCAITLIN R. BYCZKO

Law firm

Caitlin R. Byczko Barnes & Thornburg LLP

Docket

CHECK-PEND

Address

11 South Meridian Street, Indianapolis, IN 46204, United States

Get pre-filing clearance

AI attorney analyzes your proposed mark against USPTO — Go/No-Go verdict, class-by-class risks, and strategy recommendations.

Run clearance

Filing Information

StatusREGISTERED

Filing DateJun 17, 2024

Serial Number98603889

Registration No.8027222

Registration DateNov 18, 2025

Status DateNov 18, 2025

Published for OppositionSep 30, 2025

Mark TypeStandard characters

Attorney DocketCHECK-PEND

Status DescriptionLive and registered

Filing Signals

FILED

2024

YEARS AGO

CLASSES

MADRID FILINGS

—

Opposed 1× during prosecution

Search 14M+ trademarks

Free USPTO lookups by name, owner, or serial number. No account needed.

Search now

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 009Electronics, software & scientific instruments

US codes: 021, 023, 026, 036, 038

First use anywhere: May 31, 2022

First use in commerce: May 31, 2022

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: May 31, 2022

First use in commerce: May 31, 2022

Scientific and technological services and research and design relating thereto; industrial analysis, industrial research and industrial design services; quality control and authentication services; design and development of computer hardware and software.

This description is as filed with the USPTO and defines the scope of trademark protection.

Status History

25 events

REGISTERED-PRINCIPAL REGISTER

Nov 18, 2025

REGISTERED-PRINCIPAL REGISTER

NOTICE OF REGISTRATION CONFIRMATION EMAILED

Nov 18, 2025

NOTICE OF REGISTRATION CONFIRMATION EMAILED

PUBLISHED FOR OPPOSITION

Sep 30, 2025

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Sep 30, 2025

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Sep 24, 2025

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

APPROVED FOR PUB - PRINCIPAL REGISTER

Aug 29, 2025

APPROVED FOR PUB - PRINCIPAL REGISTER

EXPARTE APPEAL TERMINATED

Aug 29, 2025

EXPARTE APPEAL TERMINATED

TEAS REQUEST FOR RECONSIDERATION RECEIVED

Jul 03, 2025

TEAS REQUEST FOR RECONSIDERATION RECEIVED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Jul 03, 2025

CORRESPONDENCE RECEIVED IN LAW OFFICE

TEAS/EMAIL CORRESPONDENCE ENTERED

Jul 03, 2025

TEAS/EMAIL CORRESPONDENCE ENTERED

EXPARTE APPEAL RECEIVED AT TTAB

Jul 03, 2025

EXPARTE APPEAL RECEIVED AT TTAB

JURISDICTION RESTORED TO EXAMINING ATTORNEY

Jul 03, 2025

JURISDICTION RESTORED TO EXAMINING ATTORNEY

EX PARTE APPEAL-INSTITUTED

Jul 03, 2025

EX PARTE APPEAL-INSTITUTED

FINAL REFUSAL WRITTEN

Apr 12, 2025

FINAL REFUSAL WRITTEN

FINAL REFUSAL E-MAILED

Apr 12, 2025

FINAL REFUSAL E-MAILED

NOTIFICATION OF FINAL REFUSAL EMAILED

Apr 12, 2025

NOTIFICATION OF FINAL REFUSAL EMAILED

TEAS/EMAIL CORRESPONDENCE ENTERED

Mar 01, 2025

TEAS/EMAIL CORRESPONDENCE ENTERED

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Feb 27, 2025

TEAS RESPONSE TO OFFICE ACTION RECEIVED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Feb 27, 2025

CORRESPONDENCE RECEIVED IN LAW OFFICE

NON-FINAL ACTION WRITTEN

Feb 03, 2025

NON-FINAL ACTION WRITTEN

NON-FINAL ACTION E-MAILED

Feb 03, 2025

NON-FINAL ACTION E-MAILED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Feb 03, 2025

NOTIFICATION OF NON-FINAL ACTION E-MAILED

ASSIGNED TO EXAMINER

Jan 07, 2025

ASSIGNED TO EXAMINER

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Jan 06, 2025

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Jun 17, 2024

NEW APPLICATION ENTERED

CHECKSUM

Get pre-filing clearance

Search 14M+ trademarks

Run a conflict check

Other Marks in Class 009 — Electronics, software & scientific instruments

Other Marks by CAITLIN R. BYCZKO

Resources

Company