NL71148C - - Google Patents
Info
- Publication number
- NL71148C NL71148C NL71148DA NL71148C NL 71148 C NL71148 C NL 71148C NL 71148D A NL71148D A NL 71148DA NL 71148 C NL71148 C NL 71148C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/50—Conversion between different kinds of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB247351X | 1942-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL71148C true NL71148C (de) |
Family
ID=10216422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL71148D NL71148C (de) | 1942-04-20 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2422285A (de) |
| CH (2) | CH251036A (de) |
| FR (1) | FR933089A (de) |
| GB (1) | GB556920A (de) |
| NL (1) | NL71148C (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1463972A (en) * | 1923-08-07 | Automatic telephone system | ||
| US1503923A (en) * | 1918-05-06 | 1924-08-05 | Stromberg Carlson Telephone | Telephone switching system |
| US2090205A (en) * | 1934-06-21 | 1937-08-17 | Siemens Brothers & Co Ltd | Electric remote control system |
| US2058216A (en) * | 1935-05-11 | 1936-10-20 | Bell Telephone Labor Inc | Signaling system |
| GB469664A (en) * | 1936-01-29 | 1937-07-29 | Automatic Electric Co Ltd | Improvements in automatic switches for use in telephone or like systems |
-
0
- NL NL71148D patent/NL71148C/xx active
-
1942
- 1942-04-20 GB GB5217/42A patent/GB556920A/en not_active Expired
-
1943
- 1943-03-06 US US478243A patent/US2422285A/en not_active Expired - Lifetime
- 1943-04-19 CH CH251036D patent/CH251036A/fr unknown
- 1943-04-19 CH CH247351D patent/CH247351A/fr unknown
-
1946
- 1946-08-29 FR FR933089D patent/FR933089A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2422285A (en) | 1947-06-17 |
| GB556920A (en) | 1943-10-27 |
| CH247351A (fr) | 1947-02-28 |
| CH251036A (fr) | 1947-09-30 |
| FR933089A (fr) | 1948-04-09 |