BE370533A - - Google Patents
Info
- Publication number
- BE370533A BE370533A BE370533DA BE370533A BE 370533 A BE370533 A BE 370533A BE 370533D A BE370533D A BE 370533DA BE 370533 A BE370533 A BE 370533A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE696037X | 1929-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE370533A true BE370533A (xx) |
Family
ID=6607604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE370533D BE370533A (xx) | 1929-05-25 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE370533A (xx) |
| FR (1) | FR696037A (xx) |
-
0
- BE BE370533D patent/BE370533A/xx unknown
-
1930
- 1930-05-23 FR FR696037D patent/FR696037A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR696037A (fr) | 1930-12-24 |