USPTO serial 72390530
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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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PALO ALTO, CA
| Class | Description | Status | First use |
|---|---|---|---|
| 026 | HAND HELD PROGRAMMED LEARNING AIDS WITH QUIZ FRAMES AND MANUALLY OPERATED ANSWER SELECTING KEY, CODED TO ALLOW FRAME ADVANCEMENT BY SELECTION OF PROPER ANSWER AND PROGRAM CARTRIDGE THEREFOR | ACTIVE | Mar 22, 1971 |
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 |
|---|---|---|---|
| No prosecution events are listed. | |||