G04D 1/063
Provided with a pick-up means
Official title: {provided with a pick-up means, e.g. microphone (measuring and control means for comparison with a standard frequency G04D7/12)}
G04D1/063 (Provided with a pick-up means) appears on 1 US grants and 3 published applications in this corpus.
Search patents in G04D- Granted patents
- 1
- Published applications
- 3
- Assignees
- 1
- Inventors
- 2
- Latest grant
- 1 Sep 2020
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