BE543085A - - Google Patents
Info
- Publication number
- BE543085A BE543085A BE543085DA BE543085A BE 543085 A BE543085 A BE 543085A BE 543085D A BE543085D A BE 543085DA BE 543085 A BE543085 A BE 543085A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US478713A US2831067A (en) | 1954-12-30 | 1954-12-30 | Subscriber telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE543085A true BE543085A (it) |
Family
ID=23901078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE543085D BE543085A (it) | 1954-12-30 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2831067A (it) |
| BE (1) | BE543085A (it) |
| DE (1) | DE1100702B (it) |
| FR (1) | FR1134091A (it) |
| GB (1) | GB787824A (it) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE560458A (it) * | 1954-02-08 | |||
| US3046353A (en) * | 1956-11-10 | 1962-07-24 | Autophon Ag | Telephone sub-station including microphone amplifier |
| BE621155A (it) * | 1961-08-07 | |||
| US3621142A (en) * | 1969-06-05 | 1971-11-16 | Bunting Sterisystems Inc | Single wire dc communicating means |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB700238A (en) * | 1948-12-24 | 1953-11-25 | Western Electric Co | Circuits employing semiconductor amplifier devices |
| GB679875A (en) * | 1949-03-16 | 1952-09-24 | Siemens Ag | Improvements in or relating to an arrangement for telephone subscribers sets |
| DE862917C (de) * | 1951-07-12 | 1953-01-15 | Siemens Ag | Fernsprechstation mit Kohlemikrofon und Speisung vom Amt |
-
0
- BE BE543085D patent/BE543085A/xx unknown
-
1954
- 1954-12-30 US US478713A patent/US2831067A/en not_active Expired - Lifetime
-
1955
- 1955-07-11 FR FR1134091D patent/FR1134091A/fr not_active Expired
- 1955-11-02 DE DEW17763A patent/DE1100702B/de active Pending
- 1955-12-20 GB GB36452/55A patent/GB787824A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2831067A (en) | 1958-04-15 |
| FR1134091A (fr) | 1957-04-05 |
| GB787824A (en) | 1957-12-18 |
| DE1100702B (de) | 1961-03-02 |