BE726236A - - Google Patents
Info
- Publication number
- BE726236A BE726236A BE726236DA BE726236A BE 726236 A BE726236 A BE 726236A BE 726236D A BE726236D A BE 726236DA BE 726236 A BE726236 A BE 726236A
- Authority
- BE
- Belgium
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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Manipulation Of Pulses (AREA)
- Electronic Switches (AREA)
- Inverter Devices (AREA)
- Filters And Equalizers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69544768A | 1968-01-03 | 1968-01-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE726236A true BE726236A (US20090177143A1-20090709-C00008.png) | 1969-05-29 |
Family
ID=24793006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE726236D BE726236A (US20090177143A1-20090709-C00008.png) | 1968-01-03 | 1968-12-30 |
Country Status (6)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3737773A (en) * | 1971-07-28 | 1973-06-05 | Motorola Inc | Tachometer circuit |
| US4109197A (en) * | 1973-03-15 | 1978-08-22 | Westinghouse Electric Corp. | Prf detection system and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2541038A (en) * | 1945-12-10 | 1951-02-13 | Claud E Cleeton | Pulse discriminator system |
| US2857587A (en) * | 1955-10-17 | 1958-10-21 | Robert D Tollefson | Pulse train indicator |
| US3028556A (en) * | 1960-04-26 | 1962-04-03 | W W Henry Co Inc | Frequency-selective audio receiver |
| GB1026381A (en) * | 1961-04-27 | 1966-04-20 | Dehavilland Aircraft | Improvements in or relating to frequency responsive devices |
| US3299404A (en) * | 1962-12-28 | 1967-01-17 | Bell Telephone Labor Inc | Detection circuit responsive to pulse duration and frequency |
| US3305732A (en) * | 1963-06-10 | 1967-02-21 | Barnes Eng Co | Spurious signal void circuit |
-
1968
- 1968-01-03 US US695447A patent/US3546600A/en not_active Expired - Lifetime
- 1968-12-20 SE SE17578/68A patent/SE343998B/xx unknown
- 1968-12-30 BE BE726236D patent/BE726236A/xx not_active IP Right Cessation
- 1968-12-30 FR FR1603868D patent/FR1603868A/fr not_active Expired
-
1969
- 1969-01-02 NL NL696900021A patent/NL155419B/xx not_active IP Right Cessation
- 1969-01-02 GB GB279/69A patent/GB1241381A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1241381A (en) | 1971-08-04 |
| US3546600A (en) | 1970-12-08 |
| SE343998B (US20090177143A1-20090709-C00008.png) | 1972-03-20 |
| NL155419B (nl) | 1977-12-15 |
| DE1817548B2 (de) | 1972-11-23 |
| FR1603868A (US20090177143A1-20090709-C00008.png) | 1971-06-07 |
| NL6900021A (US20090177143A1-20090709-C00008.png) | 1969-07-07 |
| DE1817548A1 (de) | 1969-07-17 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: WESTERN ELECTRIC CY INC. Effective date: 19841230 |