BE411317A - - Google Patents
Info
- Publication number
- BE411317A BE411317A BE411317DA BE411317A BE 411317 A BE411317 A BE 411317A BE 411317D A BE411317D A BE 411317DA BE 411317 A BE411317 A BE 411317A
- 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)
- Headphones And Earphones (AREA)
- Battery Mounting, Suspending (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US443692XA | 1934-09-22 | 1934-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE411317A true BE411317A (fr) |
Family
ID=21932001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE411317D BE411317A (fr) | 1934-09-22 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE411317A (fr) |
| FR (1) | FR795076A (fr) |
| GB (1) | GB443692A (fr) |
| NL (1) | NL42562C (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10469935B2 (en) * | 2012-12-28 | 2019-11-05 | Panasonic Intellectual Property Management Co., Ltd. | Bone conduction speaker and bone conduction headphone device |
-
0
- BE BE411317D patent/BE411317A/xx unknown
- NL NL42562D patent/NL42562C/xx active
-
1935
- 1935-09-16 GB GB25692/35A patent/GB443692A/en not_active Expired
- 1935-09-17 FR FR795076D patent/FR795076A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL42562C (fr) | |
| GB443692A (en) | 1936-03-04 |
| FR795076A (fr) | 1936-03-03 |