BE432189A - - Google Patents
Info
- Publication number
- BE432189A BE432189A BE432189DA BE432189A BE 432189 A BE432189 A BE 432189A BE 432189D A BE432189D A BE 432189DA BE 432189 A BE432189 A BE 432189A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38682A US2144458A (en) | 1935-08-31 | 1935-08-31 | Bone conduction audiphone |
| BE432189T | 1939-01-16 | ||
| FR849003T | 1939-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE432189A true BE432189A (xx) | 1939-02-28 |
Family
ID=42104673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE432189D BE432189A (xx) | 1935-08-31 | 1939-01-16 |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US2144458A (xx) |
| BE (1) | BE432189A (xx) |
| FR (1) | FR849003A (xx) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE468886A (xx) * | 1941-11-28 | |||
| US2459325A (en) * | 1944-10-27 | 1949-01-18 | Zenith Radio Corp | Bone conduction unit |
| US2681389A (en) * | 1949-02-25 | 1954-06-15 | Dyna Labs Inc | Bone conduction hearing aid unit |
| US2678973A (en) * | 1950-10-02 | 1954-05-18 | Charles E Glassen | Mounting for hearing aid receivers |
| US3423544A (en) * | 1965-09-13 | 1969-01-21 | Beltone Electronics Corp | Electroacoustic bone conduction receiver |
-
1935
- 1935-08-31 US US38682A patent/US2144458A/en not_active Expired - Lifetime
-
1939
- 1939-01-16 BE BE432189D patent/BE432189A/xx unknown
- 1939-01-17 FR FR849003D patent/FR849003A/fr not_active Expired
-
1940
- 1940-01-18 US US31456440 patent/USRE22658E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| USRE22658E (en) | 1945-08-07 |
| US2144458A (en) | 1939-01-17 |
| FR849003A (fr) | 1939-11-13 |