NL183116C - Multifrequentiesignaal-ontvanginrichting. - Google Patents
Multifrequentiesignaal-ontvanginrichting.Info
- Publication number
- NL183116C NL183116C NLAANVRAGE7907335,A NL7907335A NL183116C NL 183116 C NL183116 C NL 183116C NL 7907335 A NL7907335 A NL 7907335A NL 183116 C NL183116 C NL 183116C
- Authority
- NL
- Netherlands
- Prior art keywords
- signal receiver
- multifrequency signal
- multifrequency
- receiver
- signal
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53121543A JPS5830793B2 (ja) | 1978-10-04 | 1978-10-04 | 多周波信号受信方式 |
JP12154378 | 1978-10-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
NL7907335A NL7907335A (nl) | 1980-04-09 |
NL183116C true NL183116C (nl) | 1988-07-18 |
Family
ID=14813841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NLAANVRAGE7907335,A NL183116C (nl) | 1978-10-04 | 1979-10-02 | Multifrequentiesignaal-ontvanginrichting. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4286221A (nl) |
JP (1) | JPS5830793B2 (nl) |
CA (1) | CA1128614A (nl) |
NL (1) | NL183116C (nl) |
SE (1) | SE437910B (nl) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE33381E (en) * | 1981-08-31 | 1990-10-09 | Multiple system AM stereo receiver and pilot signal detector | |
US4426728A (en) | 1981-08-31 | 1984-01-17 | Kahn Leonard R | Multiple system AM stereo receiver and pilot signal detector |
SE430554B (sv) * | 1982-04-06 | 1983-11-21 | Ericsson Telefon Ab L M | Anordning for att identifiera digitala flerfrekvenssignaler |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3555435A (en) * | 1968-11-21 | 1971-01-12 | Robert E Vosteen | Multifrequency signal detector |
CH522327A (de) * | 1970-09-28 | 1972-06-15 | Bbc Brown Boveri & Cie | Elektrische Filterschaltung |
US3805171A (en) * | 1972-07-12 | 1974-04-16 | Eastech | Signal frequency detection circuit |
US3812432A (en) * | 1973-01-05 | 1974-05-21 | Bell Telephone Labor Inc | Tone detector |
US4017742A (en) * | 1975-03-28 | 1977-04-12 | The Bendix Corporation | Multiple input, multiple failure operational voter circuit |
-
1978
- 1978-10-04 JP JP53121543A patent/JPS5830793B2/ja not_active Expired
-
1979
- 1979-10-02 NL NLAANVRAGE7907335,A patent/NL183116C/nl not_active IP Right Cessation
- 1979-10-03 US US06/081,359 patent/US4286221A/en not_active Expired - Lifetime
- 1979-10-03 CA CA336,875A patent/CA1128614A/en not_active Expired
- 1979-10-03 SE SE7908195A patent/SE437910B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US4286221A (en) | 1981-08-25 |
JPS5549093A (en) | 1980-04-08 |
CA1128614A (en) | 1982-07-27 |
SE437910B (sv) | 1985-03-18 |
SE7908195L (sv) | 1980-04-05 |
JPS5830793B2 (ja) | 1983-07-01 |
NL7907335A (nl) | 1980-04-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A1A | A request for search or an international-type search has been filed | ||
BB | A search report has been drawn up | ||
BC | A request for examination has been filed | ||
A85 | Still pending on 85-01-01 | ||
V1 | Lapsed because of non-payment of the annual fee |