Who owns the CORNERSTONE trademark?

The CORNERSTONE trademark is owned by Biamp Systems, LLC.

What is the serial number for CORNERSTONE?

The USPTO serial number for CORNERSTONE is 99144489.

What is the registration number for CORNERSTONE?

CORNERSTONE is registered under USPTO registration number 0.

CORNERSTONE - Owned by Biamp Systems, LLC - (Class 037, Class 042)

Q: What class is the CORNERSTONE trademark registered in?

The CORNERSTONE trademark is registered in Class 037 (Construction, installation & repair services), Class 042 (Scientific, technology & SaaS services).

Full Goods & Services

Class 037Construction, installation & repair services

US codes: 100, 103, 106

First use anywhere: Aug 31, 2013

First use in commerce: Aug 31, 2013

Construction services; installation and repair services; mining extraction, oil and gas drilling.

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: Aug 31, 2013

First use in commerce: Aug 31, 2013

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.

Filing Basis & Declarations

Standard Characters ClaimedFiled as Use ApplicationUse Application Currently

International Filings

Madrid Protocol1 filings

This mark has 1 Madrid Protocol filing on record with the USPTO.

1888720

480Sep 24, 2025

Source: USPTO Madrid International Filing Requests

Status History

15 events

ABANDONMENT - FAILURE TO RESPOND OR LATE RESPONSE

Jun 09, 2026

Code ABN2

ABANDONMENT NOTICE E-MAILED - FAILURE TO RESPOND

Jun 09, 2026

Code MAB2

FINAL REFUSAL WRITTEN

Feb 23, 2026

Code CNFR

FINAL REFUSAL E-MAILED

Feb 23, 2026

Code GNFR

NOTIFICATION OF FINAL REFUSAL EMAILED

Feb 23, 2026

Code GNFN

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Jan 05, 2026

Code TROA

CORRESPONDENCE RECEIVED IN LAW OFFICE

Jan 05, 2026

Code CRFA

TEAS/EMAIL CORRESPONDENCE ENTERED

Jan 05, 2026

Code TEME

NON-FINAL ACTION WRITTEN

Oct 07, 2025

Code CNRT

NON-FINAL ACTION E-MAILED

Oct 07, 2025

Code GNRT

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Oct 07, 2025

Code GNRN

ASSIGNED TO EXAMINER

Sep 12, 2025

Code DOCK

NEW APPLICATION ENTERED

Apr 18, 2025

Code NWAP

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Apr 18, 2025

Code NWOS

APPLICATION FILING RECEIPT MAILED

Apr 18, 2025

Code MAFR

Other Marks by Biamp Systems, LLC

Additional USPTO filings from the same owner.

BIA

BIAMP HEARSPACE

99227007

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REGISTERED

CON

CONNECT

85643165

Biamp Systems, LLC

REGISTERED

WOR

WORKPLACE COMMAND

99227001

Biamp Systems, LLC

REGISTERED

ALA

ALAMOS

98594861

Biamp Systems, LLC

REGISTERED

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CORNERSTONE

Full Goods & Services

Filing Basis & Declarations

International Filings

Other Marks by Biamp Systems, LLC

Other Marks in Class 037 — Construction, installation & repair services

Other Marks by Anne E. Naffziger

Get pre-filing clearance

Search 14M+ trademarks

Run a conflict check

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