USPTO serial 72303361
Reviewed by CopyMark Law Group
This page summarizes the public USPTO record for this serial number, including owners, goods and services, and prosecution history.
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| Class | Description | Status | First use |
|---|---|---|---|
| 021 | TELEPHONE CARRIER APPARATUS COMPRISING CARRIER APPARATUS-NAMELY, CENTRAL OFFICE AND SUBSCRIBER CARRIER UNITS FOR TELEPHONE SYSTEM ADAPTED FOR CONNECTION TO EXISTING CABLE PAIR, BOTH AT THE CENTRAL OFFICE AND SUBSCRIBER'S LOCATION, CREATING AN ADDITIONAL TALKING CIRCUIT OVER THE EXISTING CABLE PAIR TO WHICH AN ADDITIONAL TELEPHONE SET MAY BE SUPPLIED AT A SUBSCRIBER'S TERMINAL, FOR TELEPHONE TRUNK SERVICE (EAS AND TOLL | EXPIRED | Jul 12, 1968 |
CopyMark links this record to cited §2(d) serials, the owner's other marks, Nice classes, similar mark names, and recently changed USPTO applications.
| Date | Code | Event | What it means |
|---|---|---|---|
| Nov 4, 1992 | EXRG | EXPIRED SEC. 9 | — |