JPS4859707A - - Google Patents
Info
- Publication number
- JPS4859707A JPS4859707A JP47090527A JP9052772A JPS4859707A JP S4859707 A JPS4859707 A JP S4859707A JP 47090527 A JP47090527 A JP 47090527A JP 9052772 A JP9052772 A JP 9052772A JP S4859707 A JPS4859707 A JP S4859707A
- Authority
- JP
- Japan
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Networks Using Active Elements (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19878971A | 1971-11-15 | 1971-11-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4859707A true JPS4859707A (https=) | 1973-08-22 |
| JPS5742260B2 JPS5742260B2 (https=) | 1982-09-08 |
Family
ID=22734855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47090527A Expired JPS5742260B2 (https=) | 1971-11-15 | 1972-09-11 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3789803A (https=) |
| JP (1) | JPS5742260B2 (https=) |
| BE (1) | BE788085A (https=) |
| CA (1) | CA961185A (https=) |
| DE (1) | DE2248682A1 (https=) |
| FR (1) | FR2160366B3 (https=) |
| GB (1) | GB1395239A (https=) |
| IT (1) | IT975315B (https=) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57158250U (https=) * | 1981-03-30 | 1982-10-05 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3965308A (en) * | 1973-07-09 | 1976-06-22 | San/Bar Corporation | Line card circuit |
| US4203006A (en) * | 1978-04-20 | 1980-05-13 | Prentice Corporation | Direct access coupler |
| DE2947283B1 (de) * | 1979-11-20 | 1981-06-11 | Krone Gmbh, 1000 Berlin | Verlustfreie automatische Verpolungsschutzvorrichtung |
| US4500754A (en) * | 1981-01-15 | 1985-02-19 | Novation, Inc. | Solid state off hook phone line load |
| US4373118A (en) * | 1981-06-08 | 1983-02-08 | Bell Telephone Laboratories, Incorporated | Battery feed circuit |
| US4644103A (en) * | 1985-06-04 | 1987-02-17 | Base Ten Systems, Inc. | Tone-responsive circuit for activating an instrumentality interfacing system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3448393A (en) * | 1965-07-27 | 1969-06-03 | Foxboro Co | Means for error correction |
| US3465259A (en) * | 1966-09-27 | 1969-09-02 | Us Army | Low drift d-c operational amplifier |
| US3629514A (en) * | 1970-02-02 | 1971-12-21 | G T E Automatic Electric Lab I | Subscriber{40 s holding circuit |
-
0
- BE BE788085D patent/BE788085A/xx unknown
-
1971
- 1971-11-15 US US00198789A patent/US3789803A/en not_active Expired - Lifetime
-
1972
- 1972-06-14 CA CA144,689A patent/CA961185A/en not_active Expired
- 1972-06-15 GB GB2793772A patent/GB1395239A/en not_active Expired
- 1972-08-24 FR FR7230203A patent/FR2160366B3/fr not_active Expired
- 1972-09-11 JP JP47090527A patent/JPS5742260B2/ja not_active Expired
- 1972-10-04 DE DE19722248682 patent/DE2248682A1/de active Pending
- 1972-10-20 IT IT70308/72A patent/IT975315B/it active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57158250U (https=) * | 1981-03-30 | 1982-10-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| US3789803A (en) | 1974-02-05 |
| FR2160366A1 (https=) | 1973-06-29 |
| IT975315B (it) | 1974-07-20 |
| CA961185A (en) | 1975-01-14 |
| FR2160366B3 (https=) | 1975-10-03 |
| JPS5742260B2 (https=) | 1982-09-08 |
| GB1395239A (en) | 1975-05-21 |
| DE2248682A1 (de) | 1973-05-24 |
| BE788085A (fr) | 1973-02-28 |