BE362912A - - Google Patents
Info
- Publication number
- BE362912A BE362912A BE362912DA BE362912A BE 362912 A BE362912 A BE 362912A BE 362912D A BE362912D A BE 362912DA BE 362912 A BE362912 A BE 362912A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22353/29A GB327926A (en) | 1929-07-20 | 1929-07-20 | Telephone mufflers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE362912A true BE362912A (en) | 1929-09-30 |
Family
ID=10178021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE362912D BE362912A (en) | 1929-07-20 | 1929-08-09 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1800234A (en) |
| BE (1) | BE362912A (en) |
| DE (1) | DE518223C (en) |
| FR (1) | FR679978A (en) |
| GB (1) | GB327926A (en) |
| NL (1) | NL26028C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2458199A (en) * | 1947-04-15 | 1949-01-04 | Albert C Reinhold | Telephone transmitter support and silencer |
| NL287590A (en) * | 1962-01-09 | |||
| US3925616A (en) * | 1974-04-30 | 1975-12-09 | Bell Telephone Labor Inc | Apparatus for determining the glottal waveform |
| US9614945B1 (en) | 2014-02-18 | 2017-04-04 | Quiet, Inc. | Anti-noise canceling headset and related methods |
| US8948411B1 (en) * | 2014-02-18 | 2015-02-03 | Scott A. Moser | Ergonomic tubular anechoic chambers for use with a communication device and related methods |
| US9525765B2 (en) | 2014-02-18 | 2016-12-20 | Quiet, Inc. | Ergonomic anechoic anti-noise canceling chamber for use with a communication device and related methods |
| US9253299B2 (en) | 2014-02-18 | 2016-02-02 | Quiet, Inc. | Ergonomic tubular anechoic chambers for use with a communication device and related methods |
| US9576567B2 (en) | 2014-02-18 | 2017-02-21 | Quiet, Inc. | Ergonomic tubular anechoic chambers for use with a communication device and related methods |
| US9386135B2 (en) | 2014-05-16 | 2016-07-05 | Quiet, Inc. | Ergonomic tubular anechoic chambers for use with a communication device and related methods |
-
1929
- 1929-07-01 US US375065A patent/US1800234A/en not_active Expired - Lifetime
- 1929-07-20 GB GB22353/29A patent/GB327926A/en not_active Expired
- 1929-07-27 NL NL47411A patent/NL26028C/xx active
- 1929-08-06 DE DET37363D patent/DE518223C/en not_active Expired
- 1929-08-07 FR FR679978D patent/FR679978A/en not_active Expired
- 1929-08-09 BE BE362912D patent/BE362912A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE518223C (en) | 1931-02-20 |
| US1800234A (en) | 1931-04-14 |
| NL26028C (en) | 1932-09-15 |
| GB327926A (en) | 1930-04-17 |
| FR679978A (en) | 1930-04-23 |