BE708934A - - Google Patents
Info
- Publication number
- BE708934A BE708934A BE708934DA BE708934A BE 708934 A BE708934 A BE 708934A BE 708934D A BE708934D A BE 708934DA BE 708934 A BE708934 A BE 708934A
- 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)
- Devices For Supply Of Signal Current (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB551/67A GB1164931A (en) | 1967-01-04 | 1967-01-04 | Automatic Regulation of Telephone Sets. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE708934A true BE708934A (US07922777-20110412-C00004.png) | 1968-07-04 |
Family
ID=9706374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE708934D BE708934A (US07922777-20110412-C00004.png) | 1967-01-04 | 1968-01-04 |
Country Status (6)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS495644B1 (US07922777-20110412-C00004.png) * | 1970-02-07 | 1974-02-08 | ||
| JPS495645B1 (US07922777-20110412-C00004.png) * | 1970-02-07 | 1974-02-08 | ||
| US3745261A (en) * | 1971-09-20 | 1973-07-10 | Bell Telephone Labor Inc | Telephone set speech network |
| US4004102A (en) * | 1975-08-08 | 1977-01-18 | Bell Telephone Laboratories, Incorporated | Automatic impedance modification of transmission lines |
| US4103118A (en) * | 1977-05-02 | 1978-07-25 | Synanon Foundation, Inc. | Autobalance hybrid circuit |
| GB8317706D0 (en) * | 1983-06-29 | 1983-08-03 | Standard Telephones Cables Ltd | Telephone subsets |
| US4607140A (en) * | 1984-03-05 | 1986-08-19 | Rockwell International Corp. | Build out capacitor circuit |
| US5172410A (en) * | 1990-04-26 | 1992-12-15 | Sound Control Technologies, Inc. | Conference telephone system and method |
| US5073924A (en) * | 1990-05-01 | 1991-12-17 | Frisby Kenneth G | Telephone line noise filter apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2645681A (en) * | 1950-04-11 | 1953-07-14 | Bell Telephone Labor Inc | Telephone equalizer circuit |
| NL82970C (US07922777-20110412-C00004.png) * | 1950-12-27 | |||
| US2818470A (en) * | 1956-03-29 | 1957-12-31 | Bell Telephone Labor Inc | Compensated transistor circuit |
| US3251951A (en) * | 1962-02-26 | 1966-05-17 | Philips Corp | Circuit for automatic adjustment of impedance of a telephone loop |
| US3406262A (en) * | 1965-02-23 | 1968-10-15 | Automatic Elect Lab | Signaling arrangements controlled by line ringing current |
-
1967
- 1967-01-04 GB GB551/67A patent/GB1164931A/en not_active Expired
- 1967-12-26 US US693278A patent/US3582563A/en not_active Expired - Lifetime
- 1967-12-29 DE DE19671537625 patent/DE1537625A1/de active Pending
-
1968
- 1968-01-03 FR FR1551379D patent/FR1551379A/fr not_active Expired
- 1968-01-04 NL NL6800101A patent/NL6800101A/xx not_active Application Discontinuation
- 1968-01-04 BE BE708934D patent/BE708934A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL6800101A (US07922777-20110412-C00004.png) | 1968-07-05 |
| US3582563A (en) | 1971-06-01 |
| DE1537625A1 (de) | 1970-01-08 |
| FR1551379A (US07922777-20110412-C00004.png) | 1968-12-27 |
| GB1164931A (en) | 1969-09-24 |
