NL78690C - - Google Patents
Info
- Publication number
- NL78690C NL78690C NL78690DA NL78690C NL 78690 C NL78690 C NL 78690C NL 78690D A NL78690D A NL 78690DA NL 78690 C NL78690 C NL 78690C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US89750A US2550585A (en) | 1949-04-26 | 1949-04-26 | Telephone identification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL78690C true NL78690C (en:Method) |
Family
ID=22219408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL78690D NL78690C (en:Method) | 1949-04-26 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2550585A (en:Method) |
| BE (1) | BE495130A (en:Method) |
| DE (1) | DE822411C (en:Method) |
| FR (1) | FR1017517A (en:Method) |
| GB (1) | GB683911A (en:Method) |
| NL (1) | NL78690C (en:Method) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2708690A (en) * | 1950-08-05 | 1955-05-17 | Automatic Elect Lab | Party line telephone systems |
| US2872519A (en) * | 1952-03-24 | 1959-02-03 | North Electric Co | Automatic telephone system |
| US2809235A (en) * | 1953-02-11 | 1957-10-08 | Gen Dynamics Corp | Telephone system |
| US2820100A (en) * | 1954-02-26 | 1958-01-14 | Bell Telephone Labor Inc | Station identification device |
| US2779823A (en) * | 1954-09-17 | 1957-01-29 | Ericsson Telefon Ab L M | Connecting device in automatic telephone systems |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2299513A (en) * | 1940-06-06 | 1942-10-20 | Ass Telephone & Telegraph Co | Telephone or like system |
| NL74027C (en:Method) * | 1940-09-20 | |||
| US2270246A (en) * | 1940-09-20 | 1942-01-20 | Bell Telephone Labor Inc | Telephone system |
| US2252766A (en) * | 1940-10-17 | 1941-08-19 | Bell Telephone Labor Inc | Signaling system |
| US2344612A (en) * | 1942-06-27 | 1944-03-21 | Bell Telephone Labor Inc | Electric signaling |
-
0
- NL NL78690D patent/NL78690C/xx active
- BE BE495130D patent/BE495130A/xx unknown
-
1949
- 1949-04-26 US US89750A patent/US2550585A/en not_active Expired - Lifetime
-
1950
- 1950-03-07 FR FR1017517D patent/FR1017517A/fr not_active Expired
- 1950-03-14 DE DEW1403A patent/DE822411C/de not_active Expired
- 1950-04-21 GB GB9863/50A patent/GB683911A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE822411C (de) | 1951-11-26 |
| US2550585A (en) | 1951-04-24 |
| FR1017517A (fr) | 1952-12-11 |
| GB683911A (en) | 1952-12-10 |
| BE495130A (en:Method) |