Who owns the DIFF trademark?

The DIFF trademark is owned by Wikimedia Foundation, Inc..

What is the serial number for DIFF?

The USPTO serial number for DIFF is 90323571.

What is the registration number for DIFF?

DIFF is registered under USPTO registration number 6689109.

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Updated Sep 17, 2026·26 searches this week

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DIF

USPTO Trademark Record

REGISTERED

DIFF

Q: What class is the DIFF trademark registered in?

The DIFF trademark is registered in Class 041 (Education & entertainment services), Class 042 (Scientific, technology & SaaS services).

SN 90323571·Reg 6689109·Filed Nov 17, 2020

Owner Wikimedia Foundation, Inc.

Education; providing of training; entertainment; sporting and cultural activities.; 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.

DIFF (Serial No. 90323571), Registration No. 6689109, is a registered US trademark filed on Nov 17, 2020 by Wikimedia Foundation, Inc.. This trademark covers Class 041 (Education & entertainment services), Class 042 (Scientific, technology & SaaS services).

early section 8: April 05, 2028

Conflict Analysis

Full conflict analysis for DIFF (SN 90323571) against the USPTO database with detailed risk factor explanations. AI-powered — takes ~1-2 min.

Mark Intelligence

DIFF (Reg. #6689109) is a registered US trademark that has been protecting its owner, Wikimedia Foundation, Inc., since 2020. The mark covers Class 041 (Education & entertainment services) and Class 042 (Scientific, technology & SaaS services) respectively. Goods and services include Education; providing of training; entertainment; sporting and cultural activities.; Scientific and technological service.... The mark faced 1 opposition proceeding during prosecution.

FILED

Nov 17, 2020

SERIAL

90323571

REG#

6689109

REGISTERED

Apr 05, 2022

Filing Information

StatusREGISTERED

Filing DateNov 17, 2020

Serial Number90323571

Registration No.6689109

Registration DateApr 05, 2022

Status DateApr 05, 2022

Published for OppositionJan 18, 2022

Filing Basis & Declarations

Standard Characters ClaimedFiled as Use ApplicationUse Application Currently

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 041Education & entertainment services

US codes: 100, 101, 107

First use anywhere: Jul 14, 2020

First use in commerce: Jul 14, 2020

Education; providing of training; entertainment; sporting and cultural activities.

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: Jul 14, 2020

First use in commerce: Jul 14, 2020

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.

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Status History

27 events

TEAS CHANGE OF OWNER ADDRESS RECEIVED

May 29, 2025

TEAS CHANGE OF OWNER ADDRESS RECEIVED

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

May 29, 2025

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

May 29, 2025

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

May 29, 2025

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

May 29, 2025

TEAS CHANGE OF CORRESPONDENCE RECEIVED

REGISTERED-PRINCIPAL REGISTER

Apr 05, 2022

REGISTERED-PRINCIPAL REGISTER

PUBLISHED FOR OPPOSITION

Jan 18, 2022

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Jan 18, 2022

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Dec 29, 2021

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

APPROVED FOR PUB - PRINCIPAL REGISTER

Dec 15, 2021

APPROVED FOR PUB - PRINCIPAL REGISTER

FINAL REFUSAL WRITTEN

Dec 14, 2021

FINAL REFUSAL WRITTEN

FINAL REFUSAL E-MAILED

Dec 14, 2021

FINAL REFUSAL E-MAILED

NOTIFICATION OF FINAL REFUSAL EMAILED

Dec 14, 2021

NOTIFICATION OF FINAL REFUSAL EMAILED

TEAS REQUEST FOR RECONSIDERATION RECEIVED

Dec 14, 2021

TEAS REQUEST FOR RECONSIDERATION RECEIVED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Dec 14, 2021

CORRESPONDENCE RECEIVED IN LAW OFFICE

TEAS/EMAIL CORRESPONDENCE ENTERED

Dec 14, 2021

TEAS/EMAIL CORRESPONDENCE ENTERED

ASSIGNED TO EXAMINER

Nov 15, 2021

ASSIGNED TO EXAMINER

TEAS/EMAIL CORRESPONDENCE ENTERED

Nov 12, 2021

TEAS/EMAIL CORRESPONDENCE ENTERED

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Nov 11, 2021

TEAS RESPONSE TO OFFICE ACTION RECEIVED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Nov 11, 2021

CORRESPONDENCE RECEIVED IN LAW OFFICE

ASSIGNED TO EXAMINER

Jul 07, 2021

ASSIGNED TO EXAMINER

NON-FINAL ACTION WRITTEN

May 11, 2021

NON-FINAL ACTION WRITTEN

NON-FINAL ACTION E-MAILED

May 11, 2021

NON-FINAL ACTION E-MAILED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

May 11, 2021

NOTIFICATION OF NON-FINAL ACTION E-MAILED

ASSIGNED TO EXAMINER

Apr 28, 2021

ASSIGNED TO EXAMINER

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Jan 16, 2021

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Nov 20, 2020

NEW APPLICATION ENTERED

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