BE424243A - - Google Patents
Info
- Publication number
- BE424243A BE424243A BE424243DA BE424243A BE 424243 A BE424243 A BE 424243A BE 424243D A BE424243D A BE 424243DA BE 424243 A BE424243 A BE 424243A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT828178X | 1936-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE424243A true BE424243A (es) |
Family
ID=11319485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE424243D BE424243A (es) | 1936-10-24 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE424243A (es) |
| FR (1) | FR828178A (es) |
-
0
- BE BE424243D patent/BE424243A/xx unknown
-
1937
- 1937-10-22 FR FR828178D patent/FR828178A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR828178A (fr) | 1938-05-11 |