BE438722A - - Google Patents
Info
- Publication number
- BE438722A BE438722A BE438722DA BE438722A BE 438722 A BE438722 A BE 438722A BE 438722D A BE438722D A BE 438722DA BE 438722 A BE438722 A BE 438722A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/04—Recording calls, or communications in printed, perforated or other permanent form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Exchange Systems With Centralized Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB219019X | 1939-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE438722A true BE438722A (https=) |
Family
ID=10170718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE438722D BE438722A (https=) | 1939-04-22 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE438722A (https=) |
| CH (1) | CH219019A (https=) |
| FR (1) | FR864742A (https=) |
| GB (1) | GB528193A (https=) |
-
0
- BE BE438722D patent/BE438722A/xx unknown
-
1939
- 1939-04-22 GB GB12131/39A patent/GB528193A/en not_active Expired
-
1940
- 1940-04-10 FR FR864742D patent/FR864742A/fr not_active Expired
- 1940-04-29 CH CH219019D patent/CH219019A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH219019A (fr) | 1942-01-15 |
| GB528193A (en) | 1940-10-24 |
| FR864742A (fr) | 1941-05-03 |