G04B 9/025
Acoustical or electrical indicating means
Official title: {Acoustical or electrical indicating means}
G04B9/025 (Acoustical or electrical indicating means) appears on 1 US grants and 1 published applications in this corpus.
Search patents in G04B- Granted patents
- 1
- Published applications
- 1
- Assignees
- 1
- Inventors
- 1
- Latest grant
- 21 Oct 2014
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| Year | Granted patents | Published applications |
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| 2013 | 0 | 1 |
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