Who owns the EFF trademark?

The EFF trademark is owned by Electronic Frontier Foundation, Inc..

What class is the EFF trademark registered in?

The EFF trademark is registered in Class 042 (Scientific, technology & SaaS services).

What is the serial number for EFF?

The USPTO serial number for EFF is 74347440.

What is the registration number for EFF?

EFF is registered under USPTO registration number 1809756.

Sealvo

Home Search: EFFEFF #74347440

Back

Updated Oct 13, 2026·21 searches this week

View on USPTO TSDR Find similar marks

EFF

USPTO Trademark Record

REGISTERED

EFF

SN 74347440·Reg 1809756·Filed Jan 11, 1993

Owner Electronic Frontier Foundation, Inc.

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.

EFF (Serial No. 74347440), Registration No. 1809756, is a registered US trademark filed on Jan 11, 1993 by Electronic Frontier Foundation, Inc.. This trademark covers Class 042 (Scientific, technology & SaaS services).

Section 8/9 declaration window: December 07, 2033

Mark Intelligence

EFF (Reg. #1809756) is a registered US trademark that has been protecting its owner, Electronic Frontier Foundation, Inc., since 1993. The mark covers Class 042 (Scientific, technology & SaaS services). Goods and services include Scientific and technological services and research and design relating thereto; industrial analysis, industrial research.... The mark faced 1 opposition proceeding during prosecution.

FILED

Jan 11, 1993

SERIAL

74347440

REG#

1809756

REGISTERED

Dec 07, 1993

Filing Information

StatusREGISTERED

Filing DateJan 11, 1993

Serial Number74347440

Registration No.1809756

Registration DateDec 07, 1993

Status DateAug 03, 2023

Published for OppositionSep 14, 1993

Filing Basis & Declarations

Filed as Use ApplicationUse Application CurrentlySection 8 AcceptedSection 15 Acknowledged

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 042Scientific, technology & SaaS services

US codes: 100

First use anywhere: Jan 15, 1992

First use in commerce: Jan 15, 1992

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

Run a conflict check

Search by serial number, mark name, or logo. See conflicting marks ranked by risk with clear explanations of what contributed.

Run conflict check

Status History

39 events

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

Aug 22, 2025

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

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Aug 22, 2025

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Aug 22, 2025

TEAS CHANGE OF CORRESPONDENCE RECEIVED

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

Aug 03, 2023

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

Aug 03, 2023

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

REGISTERED AND RENEWED (THIRD RENEWAL - 10 YRS)

Aug 03, 2023

REGISTERED AND RENEWED (THIRD RENEWAL - 10 YRS)

NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED

Aug 03, 2023

NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED

TEAS SECTION 8 & 9 RECEIVED

Jan 16, 2023

TEAS SECTION 8 & 9 RECEIVED

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

Dec 15, 2022

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

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Dec 15, 2022

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Dec 15, 2022

TEAS CHANGE OF CORRESPONDENCE RECEIVED

COURTESY REMINDER - SEC. 8 (10-YR)/SEC. 9 E-MAILED

Dec 07, 2022

COURTESY REMINDER - SEC. 8 (10-YR)/SEC. 9 E-MAILED

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

Jun 25, 2021

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

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Jun 25, 2021

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Jun 25, 2021

TEAS CHANGE OF CORRESPONDENCE RECEIVED

TEAS CHANGE OF OWNER ADDRESS RECEIVED

Jul 29, 2015

TEAS CHANGE OF OWNER ADDRESS RECEIVED

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

Jul 29, 2015

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

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

Jul 15, 2015

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

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Jul 15, 2015

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

Mar 12, 2013

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

REGISTERED AND RENEWED (SECOND RENEWAL - 10 YRS)

Mar 12, 2013

REGISTERED AND RENEWED (SECOND RENEWAL - 10 YRS)

NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED

Mar 12, 2013

NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED

TEAS SECTION 8 & 9 RECEIVED

Feb 25, 2013

TEAS SECTION 8 & 9 RECEIVED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Apr 29, 2009

TEAS CHANGE OF CORRESPONDENCE RECEIVED

CASE FILE IN TICRS

Sep 12, 2007

CASE FILE IN TICRS

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

May 18, 2003

REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED

REGISTERED AND RENEWED (FIRST RENEWAL - 10 YRS)

May 18, 2003

REGISTERED AND RENEWED (FIRST RENEWAL - 10 YRS)

TEAS SECTION 8 & 9 RECEIVED

Feb 28, 2003

TEAS SECTION 8 & 9 RECEIVED

REGISTERED - COMBINED SECTION 8 (10-YR) & SEC. 9 FILED

Feb 28, 2003

REGISTERED - COMBINED SECTION 8 (10-YR) & SEC. 9 FILED

REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK.

Sep 11, 2000

REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK.

REGISTERED - SEC. 8 (6-YR) & SEC. 15 FILED

May 09, 2000

REGISTERED - SEC. 8 (6-YR) & SEC. 15 FILED

REGISTERED-PRINCIPAL REGISTER

Dec 07, 1993

REGISTERED-PRINCIPAL REGISTER

PUBLISHED FOR OPPOSITION

Sep 14, 1993

PUBLISHED FOR OPPOSITION

NOTICE OF PUBLICATION

Aug 13, 1993

NOTICE OF PUBLICATION

APPROVED FOR PUB - PRINCIPAL REGISTER

Jul 01, 1993

APPROVED FOR PUB - PRINCIPAL REGISTER

EXAMINER'S AMENDMENT MAILED

Jun 30, 1993

EXAMINER'S AMENDMENT MAILED

CORRESPONDENCE RECEIVED IN LAW OFFICE

May 28, 1993

CORRESPONDENCE RECEIVED IN LAW OFFICE

NON-FINAL ACTION MAILED

Apr 06, 1993

NON-FINAL ACTION MAILED

ASSIGNED TO EXAMINER

Mar 26, 1993

ASSIGNED TO EXAMINER

Other Marks in Class 042 — Scientific, technology & SaaS services

Recently filed and registered marks in the same international class.

EFF

88019523

Electronic Frontier Foundation

REGISTERED

EFF

88019479

Electronic Frontier Foundation

ABANDONED

EFF

EFF, ELECTRONIC FRONTIER FOUNDATION

88019541

Electronic Frontier Foundation

REGISTERED

PRO

PRO EFF

75591163

PRO.EFF GmbH

ABANDONED

Other Marks by BENJAMIN A COSTA

Additional USPTO filings handled by the same attorney of record.

LOG

LogoMark

99674324

90882382

NELNETBANK

88050281

REGISTERED

HED

HEDGEHOG

97122034

REGISTERED

EFF

Run a conflict check

Other Marks in Class 042 — Scientific, technology & SaaS services

Other Marks by BENJAMIN A COSTA

Get pre-filing clearance

Search 14M+ trademarks

Resources

Company