BE498982A - - Google Patents
Info
- Publication number
- BE498982A BE498982A BE498982DA BE498982A BE 498982 A BE498982 A BE 498982A BE 498982D A BE498982D A BE 498982DA BE 498982 A BE498982 A BE 498982A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US205052A US2761011A (en) | 1951-01-09 | 1951-01-09 | Intercommunication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE498982A true BE498982A (US07321065-20080122-C00160.png) |
Family
ID=22760581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE498982D BE498982A (US07321065-20080122-C00160.png) | 1951-01-09 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2761011A (US07321065-20080122-C00160.png) |
| BE (1) | BE498982A (US07321065-20080122-C00160.png) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2850569A (en) * | 1953-09-07 | 1958-09-02 | Defensor A G | Electric arrangement for speech transmission in two directions |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2205142A (en) * | 1937-02-03 | 1940-06-18 | Holtzer Cabot Electric Co | Loudspeaking telephone system |
| US2323307A (en) * | 1940-07-01 | 1943-07-06 | Webster Electric Co Inc | Communication system |
| US2319680A (en) * | 1940-12-02 | 1943-05-18 | Hasenberg Werner | Simultaneous transmitting and receiving system with electronic change-over device |
| US2347080A (en) * | 1942-12-14 | 1944-04-18 | Webster Electric Co Inc | Communication system |
| US2515726A (en) * | 1945-09-24 | 1950-07-18 | Automatic Elect Lab | Intercommunicating system |
| FR1004866A (fr) * | 1948-01-26 | 1952-04-03 | Perfectionnements aux installations téléphoniques à haut-parleur | |
| US2545466A (en) * | 1948-07-10 | 1951-03-20 | Le Teleampliphone Soc | Loud-speaker telephone installation |
| US2536820A (en) * | 1948-09-17 | 1951-01-02 | Prahm Louis | Two-way communication system |
| US2623949A (en) * | 1949-06-08 | 1952-12-30 | Le Teleampliphone Soc | Two-way loud-speaker telephone installation |
-
0
- BE BE498982D patent/BE498982A/xx unknown
-
1951
- 1951-01-09 US US205052A patent/US2761011A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2761011A (en) | 1956-08-28 |
