DE3174827D1 - Tone detector circuit - Google Patents
Tone detector circuitInfo
- Publication number
- DE3174827D1 DE3174827D1 DE8282900456T DE3174827T DE3174827D1 DE 3174827 D1 DE3174827 D1 DE 3174827D1 DE 8282900456 T DE8282900456 T DE 8282900456T DE 3174827 T DE3174827 T DE 3174827T DE 3174827 D1 DE3174827 D1 DE 3174827D1
- Authority
- DE
- Germany
- Prior art keywords
- detector circuit
- tone detector
- tone
- circuit
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/218,878 US4405837A (en) | 1980-12-22 | 1980-12-22 | Tone detector circuit |
PCT/US1981/001693 WO1982002304A1 (en) | 1980-12-22 | 1981-12-17 | Tone detector circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3174827D1 true DE3174827D1 (en) | 1986-07-17 |
Family
ID=26765079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8282900456T Expired DE3174827D1 (en) | 1980-12-22 | 1981-12-17 | Tone detector circuit |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3174827D1 (en) |
HK (1) | HK94588A (en) |
-
1981
- 1981-12-17 DE DE8282900456T patent/DE3174827D1/en not_active Expired
-
1988
- 1988-11-24 HK HK94588A patent/HK94588A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
HK94588A (en) | 1988-12-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |