NL288870A - - Google Patents
Info
- Publication number
- NL288870A NL288870A NL288870DA NL288870A NL 288870 A NL288870 A NL 288870A NL 288870D A NL288870D A NL 288870DA NL 288870 A NL288870 A NL 288870A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE613770A BE613770A (fr) | 1962-02-12 | 1962-02-12 | Système téléphonique de campagne. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL288870A true NL288870A (pt) |
Family
ID=3845323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL288870D NL288870A (pt) | 1962-02-12 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3264412A (pt) |
| BE (1) | BE613770A (pt) |
| DE (1) | DE1437401A1 (pt) |
| NL (1) | NL288870A (pt) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4001515A (en) * | 1974-11-21 | 1977-01-04 | Astreon Corporation | Interfacing unit for telephone networks |
| IT1143632B (it) * | 1977-01-24 | 1986-10-22 | Sits Soc It Telecom Siemens | Circuito rivelatore di chiamata acustica,specialmente per apparecchi telefonici |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2299257A (en) * | 1941-07-09 | 1942-10-20 | Simon Harry | Telephone dial mask |
| GB641888A (en) * | 1947-02-07 | 1950-08-23 | Standard Telephones Cables Ltd | Improvements in or relating to electric signalling systems |
| US2590804A (en) * | 1949-12-22 | 1952-03-25 | Anthony S Vitale | Battery casing |
| US2707211A (en) * | 1951-03-30 | 1955-04-26 | Itt | Adapter circuit |
| US2700695A (en) * | 1953-12-10 | 1955-01-25 | Herbert A Gottschall | Plastic battery case |
| US2834837A (en) * | 1954-12-08 | 1958-05-13 | North Electric Co | Dust cover of silencing material for telephone dial mechanism |
| US2951910A (en) * | 1958-01-14 | 1960-09-06 | North Electric Co | Substation signalling device |
| US2949507A (en) * | 1959-05-14 | 1960-08-16 | Bell Telephone Labor Inc | Electrical information system |
| US3156775A (en) * | 1959-12-02 | 1964-11-10 | Itt | Telephone converter |
-
0
- NL NL288870D patent/NL288870A/xx unknown
-
1962
- 1962-02-12 BE BE613770A patent/BE613770A/fr unknown
-
1963
- 1963-01-30 US US255051A patent/US3264412A/en not_active Expired - Lifetime
- 1963-02-08 DE DE19631437401 patent/DE1437401A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE613770A (fr) | 1962-08-13 |
| US3264412A (en) | 1966-08-02 |
| DE1437401A1 (de) | 1968-10-24 |