BE368089A - - Google Patents
Info
- Publication number
- BE368089A BE368089A BE368089DA BE368089A BE 368089 A BE368089 A BE 368089A BE 368089D A BE368089D A BE 368089DA BE 368089 A BE368089 A BE 368089A
- 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
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB469430A GB348573A (en) | 1930-02-12 | 1930-02-12 | Improvements relating to electrostatic loud-speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE368089A true BE368089A (fr) | 1930-03-31 |
Family
ID=9782030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE368089D BE368089A (fr) | 1930-02-12 | 1930-02-26 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE368089A (fr) |
| FR (1) | FR690527A (fr) |
| GB (1) | GB348573A (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2659022A (en) * | 1951-05-22 | 1953-11-10 | Tele King Corp | Electrostatic deflection system |
| US3008013A (en) * | 1954-07-20 | 1961-11-07 | Ferranti Ltd | Electrostatic loudspeakers |
| DE1103391B (de) * | 1955-10-19 | 1961-03-30 | Max Braun Fa | Elektrostatischer Lautsprecher |
| US3118022A (en) * | 1961-08-07 | 1964-01-14 | Bell Telephone Labor Inc | Electroacoustic transducer |
| US3778561A (en) * | 1972-06-21 | 1973-12-11 | Bell Canada Northern Electric | Electret microphone |
| JPS5419172B2 (fr) * | 1973-07-23 | 1979-07-13 | ||
| US4160881A (en) * | 1977-12-28 | 1979-07-10 | Microtel B.V. | Electret transducers: acoustically transparent backplate of sintered conductive spheres and a thin electret coating; meshlike diaphragm spacing screen overlays apertured electret backplate with screen junctions overlaying the apertures |
-
1930
- 1930-02-12 GB GB469430A patent/GB348573A/en not_active Expired
- 1930-02-25 FR FR690527D patent/FR690527A/fr not_active Expired
- 1930-02-26 BE BE368089D patent/BE368089A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB348573A (en) | 1931-05-12 |
| FR690527A (fr) | 1930-09-23 |