FR860275A - Development of signal receiving devices - Google Patents
Development of signal receiving devicesInfo
- Publication number
- FR860275A FR860275A FR860275DA FR860275A FR 860275 A FR860275 A FR 860275A FR 860275D A FR860275D A FR 860275DA FR 860275 A FR860275 A FR 860275A
- Authority
- FR
- France
- Prior art keywords
- development
- signal receiving
- receiving devices
- devices
- signal
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR860275T | 1939-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR860275A true FR860275A (en) | 1941-01-10 |
Family
ID=9332598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR860275D Expired FR860275A (en) | 1939-09-16 | 1939-09-16 | Development of signal receiving devices |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR860275A (en) |
-
1939
- 1939-09-16 FR FR860275D patent/FR860275A/en not_active Expired
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