FR64957E - Voice frequency receivers - Google Patents
Voice frequency receiversInfo
- Publication number
- FR64957E FR64957E FR64957DA FR64957E FR 64957 E FR64957 E FR 64957E FR 64957D A FR64957D A FR 64957DA FR 64957 E FR64957 E FR 64957E
- Authority
- FR
- France
- Prior art keywords
- voice frequency
- frequency receivers
- receivers
- voice
- frequency
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL160821 | 1951-04-27 | ||
DE303094X | 1951-06-30 | ||
NL219653 | 1957-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR64957E true FR64957E (en) | 1955-12-15 |
Family
ID=27188829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR64957D Expired FR64957E (en) | 1951-04-27 | 1952-06-27 | Voice frequency receivers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR64957E (en) |
GB (1) | GB712952A (en) |
-
1952
- 1952-06-27 GB GB16257/52A patent/GB712952A/en not_active Expired
- 1952-06-27 FR FR64957D patent/FR64957E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB712952A (en) | 1954-08-04 |
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