USPTO serial 71627947
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 |
|---|---|---|---|
| 026 | INSTRUMENT THAT IS A NARROW BAND SWEEPING OSCILLATOR FOR USE WITH AN OSCILLOSCOPE IN DEFINING THE PASS BAND CHARACTERISTICS OF AMPLIFIERS AND FILTERS BY PROVIDING A NARROW FREQUENCY SWEEP WHICH CAN BE CENTERED AT FREQUENCIES FROM 50 KILOCYCLES TO 2 MEGACYCLES AND ALSO DEVELOPS MARKER PIPS WHICH ARE INDEPENDENT OF THE AMPLIFIER CIRCUITS UNDER TEST AND OTHER USES | EXPIRED | Aug 15, 1951 |
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 |
|---|---|---|---|
| Oct 10, 1994 | EXRG | EXPIRED SEC. 9 | — |
| Jan 5, 1974 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |