USPTO serial 72123381
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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 | ELECTRONIC TUBES-NAMELY, MAGNETRONS; KLYSTRONS AND WAVE TUBES, AND MICROWAVE TRANSMISSION DEVICE-NAMELY, GASEOUS DISCHARGE ATTENUATOR TUBES; GASEOUS DISCHARGE SWITCHING TUBES INCLUDING TRANSMIT RECEIVE, ANTI-TRANSMIT RECEIVE, AND PRE-TRANSMIT RECEIVE TUBES; GRID CONTROLLED GAS RECTIFIER TUBES; SPARK GAP MODULATOR TUBES; MICROWAVE DUPLEXERS; DIRECTIONAL COUPLERS; POWER DIVIDERS; MIXER DIODES; TRANSMISSION CAVITIES; CRYSTAL PROTECTORS; ECHO BOXES; RELAYS; NOISE SOURCES; SURGE PROTECTORS; AND PRESSURIZING WINDOWS FOR RADIO DIRECTION AND RANGE SYSTEMS | EXPIRED | Apr 28, 1961 |
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 23, 1987 | EXRG | EXPIRED SEC. 9 | — |