BE484143A - - Google Patents
Info
- Publication number
- BE484143A BE484143A BE484143DA BE484143A BE 484143 A BE484143 A BE 484143A BE 484143D A BE484143D A BE 484143DA BE 484143 A BE484143 A BE 484143A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
- H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH656922X | 1947-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE484143A true BE484143A (https=) |
Family
ID=4526574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE484143D BE484143A (https=) | 1947-07-30 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE484143A (https=) |
| CH (1) | CH259965A (https=) |
| FR (1) | FR969548A (https=) |
| GB (1) | GB656922A (https=) |
-
0
- BE BE484143D patent/BE484143A/xx unknown
-
1947
- 1947-07-30 CH CH259965D patent/CH259965A/de unknown
-
1948
- 1948-04-16 GB GB10576/48A patent/GB656922A/en not_active Expired
- 1948-07-26 FR FR969548D patent/FR969548A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR969548A (fr) | 1950-12-21 |
| CH259965A (de) | 1949-02-15 |
| GB656922A (en) | 1951-09-05 |