BE481181A - - Google Patents
Info
- Publication number
- BE481181A BE481181A BE481181DA BE481181A BE 481181 A BE481181 A BE 481181A BE 481181D A BE481181D A BE 481181DA BE 481181 A BE481181 A BE 481181A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/62—Constructional arrangements
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2498153X | 1947-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE481181A true BE481181A (en:Method) |
Family
ID=9685838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE481181D BE481181A (en:Method) | 1947-04-29 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2498153A (en:Method) |
| BE (1) | BE481181A (en:Method) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2763719A (en) * | 1954-08-02 | 1956-09-18 | Jay V Zimmerman Company | Intercommunication devices |
| USD311541S (en) | 1987-10-27 | 1990-10-23 | 501 France Cables ET Radio | Audioconference telephonic terminal set |
| USD326267S (en) | 1989-12-07 | 1992-05-19 | Weiser Margaret A | Portable telephone amplifier unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US893820A (en) * | 1907-03-20 | 1908-07-21 | Electric Goods Mfg Company | Intercommunicating telephones. |
| US2157140A (en) * | 1936-09-26 | 1939-05-09 | Louis A Molin | Transmitting and amplifying system |
| GB508031A (en) * | 1937-12-23 | 1939-06-23 | Automatic Telephone & Elect | Improvements in or relating to telephone systems |
-
0
- BE BE481181D patent/BE481181A/xx unknown
-
1948
- 1948-03-16 US US15212A patent/US2498153A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2498153A (en) | 1950-02-21 |