BE354512A - - Google Patents
Info
- Publication number
- BE354512A BE354512A BE354512DA BE354512A BE 354512 A BE354512 A BE 354512A BE 354512D A BE354512D A BE 354512DA BE 354512 A BE354512 A BE 354512A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M5/00—Manual exchanges
- H04M5/10—Manual exchanges using separate plug for each subscriber
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US221878A US1771842A (en) | 1927-09-26 | 1927-09-26 | Telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE354512A true BE354512A (zh) |
Family
ID=22829790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE354512D BE354512A (zh) | 1927-09-26 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1771842A (zh) |
| BE (1) | BE354512A (zh) |
| GB (1) | GB297747A (zh) |
-
0
- BE BE354512D patent/BE354512A/xx unknown
-
1927
- 1927-09-26 US US221878A patent/US1771842A/en not_active Expired - Lifetime
-
1928
- 1928-09-25 GB GB27534/28A patent/GB297747A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1771842A (en) | 1930-07-29 |
| GB297747A (zh) | 1929-12-27 |