BE562284A - - Google Patents
Info
- Publication number
- BE562284A BE562284A BE562284DA BE562284A BE 562284 A BE562284 A BE 562284A BE 562284D A BE562284D A BE 562284DA BE 562284 A BE562284 A BE 562284A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1107718X | 1957-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE562284A true BE562284A (en:Method) |
Family
ID=4557872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE562284D BE562284A (en:Method) | 1957-03-21 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE562284A (en:Method) |
| CH (2) | CH347231A (en:Method) |
| DE (1) | DE1107718B (en:Method) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666812A (en) * | 1951-10-24 | 1954-01-19 | Bell Telephone Labor Inc | Telephone signaling system |
| NL87007C (en:Method) * | 1952-08-16 | |||
| DE1001713B (de) * | 1953-12-07 | 1957-01-31 | Telefonbau & Normalzeit Gmbh | Telefonteilnehmerstation mit tastengesteuerter Frequenzwahl und einem Schichttransistoren enthaltenden Mikrophonverstaerker |
| DE1729258U (de) * | 1955-06-18 | 1956-09-06 | Quante & Co K G | Anordnung zur ruf- und signalfrequenzerzeugung fuer ob-fernsprechapparate und vermittlungseinrichtungen. |
-
0
- BE BE562284D patent/BE562284A/xx unknown
-
1956
- 1956-11-10 CH CH347231D patent/CH347231A/de unknown
-
1957
- 1957-03-21 CH CH350016D patent/CH350016A/de unknown
- 1957-10-30 DE DEA28201A patent/DE1107718B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH347231A (de) | 1960-06-30 |
| DE1107718B (de) | 1961-05-31 |
| CH350016A (de) | 1960-11-15 |