NL272337A - - Google Patents
Info
- Publication number
- NL272337A NL272337A NL272337DA NL272337A NL 272337 A NL272337 A NL 272337A NL 272337D A NL272337D A NL 272337DA NL 272337 A NL272337 A NL 272337A
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78147A US3059058A (en) | 1960-12-23 | 1960-12-23 | Subscriber line circuit with local ringing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL272337A true NL272337A (US20070167544A1-20070719-C00007.png) |
Family
ID=22142214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL272337D NL272337A (US20070167544A1-20070719-C00007.png) | 1960-12-23 |
Country Status (7)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE632293A (US20070167544A1-20070719-C00007.png) * | 1961-03-03 | |||
| US3235669A (en) * | 1963-01-17 | 1966-02-15 | Northern Electric Co | Telephone signalling circuits |
| US3247327A (en) * | 1963-01-17 | 1966-04-19 | Northern Electric Co | Telephone signalling circuits |
| US3312787A (en) * | 1963-10-17 | 1967-04-04 | Stromberg Carlson Corp | Signaling system |
| US3443033A (en) * | 1963-10-31 | 1969-05-06 | Bell Telephone Labor Inc | Ringing arrangement for time division telephone systems |
| US3671678A (en) * | 1970-12-22 | 1972-06-20 | Stromberg Carlson Corp | Ringing control circuit |
| US3978293A (en) * | 1974-11-07 | 1976-08-31 | Bell Telephone Laboratories, Incorporated | Ringing control circuitry with shared ringing loop current detector |
| US3978292A (en) * | 1974-11-07 | 1976-08-31 | Bell Telephone Laboratories, Incorporated | Ringing control circuitry with shared ringing loop current detector |
| FR2296324A1 (fr) * | 1974-12-27 | 1976-07-23 | Ericsson Telefon Ab L M | Dispositif d'appel perfectionne pour installations de telephonie |
| WO2015073672A2 (en) | 2013-11-15 | 2015-05-21 | Invista Technologies S.A.R.L. | Transformation of peroxyacetal intermediate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2152475A (en) * | 1938-03-29 | 1939-03-28 | Bell Telephone Labor Inc | Signaling system |
| NL182780B (nl) * | 1952-11-18 | Ici Ltd | Werkwijze voor de vervaardiging van een vuurvaste module, in het bijzonder een katalysatordrager. |
-
0
- NL NL272337D patent/NL272337A/xx unknown
-
1960
- 1960-12-23 US US78147A patent/US3059058A/en not_active Expired - Lifetime
-
1961
- 1961-12-14 GB GB44750/61A patent/GB1002571A/en not_active Expired
- 1961-12-18 BE BE611694A patent/BE611694A/fr unknown
- 1961-12-22 DE DEW31344A patent/DE1202349B/de active Pending
- 1961-12-22 FR FR882947A patent/FR1311553A/fr not_active Expired
- 1961-12-22 JP JP4642461A patent/JPS403575B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1002571A (en) | 1965-08-25 |
| FR1311553A (fr) | 1962-12-07 |
| BE611694A (fr) | 1962-04-16 |
| US3059058A (en) | 1962-10-16 |
| JPS403575B1 (US20070167544A1-20070719-C00007.png) | 1965-02-25 |
| DE1202349B (de) | 1965-10-07 |
