BE499228A - - Google Patents
Info
- Publication number
- BE499228A BE499228A BE499228DA BE499228A BE 499228 A BE499228 A BE 499228A BE 499228D A BE499228D A BE 499228DA BE 499228 A BE499228 A BE 499228A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Relay Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US129599A US2652454A (en) | 1949-11-26 | 1949-11-26 | Rotary connector switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE499228A true BE499228A (en:Method) |
Family
ID=22440740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE499228D BE499228A (en:Method) | 1949-11-26 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2652454A (en:Method) |
| BE (1) | BE499228A (en:Method) |
| GB (1) | GB683339A (en:Method) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1386688A (en) * | 1919-06-05 | 1921-08-09 | Western Electric Co | Telephone-exchange system |
| US1556897A (en) * | 1925-04-14 | 1925-10-13 | Reuben H Bare | Perforation cleaner for oil-well casings |
| US1799175A (en) * | 1927-02-25 | 1931-04-07 | Merk Friedrich | Automatic telephone system |
| GB337829A (en) * | 1929-08-09 | 1930-11-10 | Automatic Telephone Mfg Co Ltd | Improvements in or relating to automatic switches for use in telephone or like systems |
| GB351959A (en) * | 1930-03-31 | 1931-06-30 | Siemens Brothers & Co Ltd | Improvements relating to automatic and semi-automatic telephone systems |
| NL57800C (nl) * | 1941-04-15 | 1946-07-15 | Bell Telephone Manf Co Sa | Electrisch seinstelsel |
| NL57905C (nl) * | 1941-05-20 | 1946-07-15 | Bell Telephone Manufacturing Co Sa | Telefoonstelsel of soortgelijk stelsel |
-
0
- BE BE499228D patent/BE499228A/xx unknown
-
1949
- 1949-11-26 US US129599A patent/US2652454A/en not_active Expired - Lifetime
-
1950
- 1950-10-13 GB GB25048/50A patent/GB683339A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB683339A (en) | 1952-11-26 |
| US2652454A (en) | 1953-09-15 |