BE475814A - - Google Patents
Info
- Publication number
- BE475814A BE475814A BE475814DA BE475814A BE 475814 A BE475814 A BE 475814A BE 475814D A BE475814D A BE 475814DA BE 475814 A BE475814 A BE 475814A
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3346145A GB625014A (en) | 1945-12-11 | 1945-12-11 | Improvements in or relating to acoustic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE475814A true BE475814A (pt) |
Family
ID=10353267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE475814D BE475814A (pt) | 1945-12-11 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE475814A (pt) |
| ES (1) | ES177021A1 (pt) |
| FR (1) | FR948086A (pt) |
| GB (1) | GB625014A (pt) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3154172A (en) * | 1962-07-19 | 1964-10-27 | Tibbetts Industries | Diaphragm and impedance means |
| US3285364A (en) * | 1965-06-01 | 1966-11-15 | Ling Temco Vought Inc | Loudspeaker construction |
-
0
- BE BE475814D patent/BE475814A/xx unknown
-
1945
- 1945-12-11 GB GB3346145A patent/GB625014A/en not_active Expired
-
1946
- 1946-12-06 FR FR948086D patent/FR948086A/fr not_active Expired
-
1947
- 1947-02-28 ES ES177021A patent/ES177021A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR948086A (fr) | 1949-07-21 |
| GB625014A (en) | 1949-06-21 |
| ES177021A1 (es) | 1947-04-16 |