G06K 21/04
In which coincidence of markings is sensed optically
Official title: in which coincidence of markings is sensed optically, e.g. peek-a-boo system
G06K21/04 (In which coincidence of markings is sensed optically) appears on 4 US grants and 0 published applications in this corpus.
Search patents in G06K- Granted patents
- 4
- Published applications
- 0
- Assignees
- 1
- Inventors
- 5
- Latest grant
- 24 Apr 1979
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| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
By publication year. Applications have been published since 2001.
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