NL77668C - - Google Patents
Info
- Publication number
- NL77668C NL77668C NL77668DA NL77668C NL 77668 C NL77668 C NL 77668C NL 77668D A NL77668D A NL 77668DA NL 77668 C NL77668 C NL 77668C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/16—Arrangements for interconnection between switching centres in systems employing carrier frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2545642X | 1947-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL77668C true NL77668C (ja�@�@) |
Family
ID=10909702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL77668D NL77668C (ja�@�@) | 1947-01-27 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2545642A (ja�@�@) |
| NL (1) | NL77668C (ja�@�@) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2657266A (en) * | 1950-11-04 | 1953-10-27 | Bell Telephone Labor Inc | Automatic multichannel selection |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2143163A (en) * | 1935-12-18 | 1939-01-10 | Bell Telephone Labor Inc | Carrier communication system |
| US2107168A (en) * | 1936-02-12 | 1938-02-01 | Bell Telephone Labor Inc | Carrier communicating system |
| US2155176A (en) * | 1936-11-07 | 1939-04-18 | Associated Electric Lab Inc | Telephone system |
| BE442115A (ja�@�@) * | 1940-02-29 | |||
| US2337878A (en) * | 1942-05-13 | 1943-12-28 | Bell Telephone Labor Inc | Carrier wave signaling system |
| US2387018A (en) * | 1942-08-05 | 1945-10-16 | Bell Lab Inc | Communication system |
| US2408085A (en) * | 1943-07-23 | 1946-09-24 | Bell Telephone Labor Inc | Communication system |
| US2440239A (en) * | 1945-12-06 | 1948-04-27 | Bell Telephone Labor Inc | Two-way carrier wave telephone system |
-
0
- NL NL77668D patent/NL77668C/xx active
-
1948
- 1948-01-24 US US4145A patent/US2545642A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2545642A (en) | 1951-03-20 |