FR2134020B1 - - Google Patents
Info
- Publication number
- FR2134020B1 FR2134020B1 FR7214188A FR7214188A FR2134020B1 FR 2134020 B1 FR2134020 B1 FR 2134020B1 FR 7214188 A FR7214188 A FR 7214188A FR 7214188 A FR7214188 A FR 7214188A FR 2134020 B1 FR2134020 B1 FR 2134020B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2119913A DE2119913C3 (en) | 1971-04-23 | 1971-04-23 | Electroacoustic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2134020A1 FR2134020A1 (en) | 1972-12-01 |
| FR2134020B1 true FR2134020B1 (en) | 1974-12-20 |
Family
ID=5805701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7214188A Expired FR2134020B1 (en) | 1971-04-23 | 1972-04-21 |
Country Status (14)
| Country | Link |
|---|---|
| AR (1) | AR192770A1 (en) |
| AT (1) | AT307530B (en) |
| BE (1) | BE782492A (en) |
| BG (1) | BG22860A3 (en) |
| BR (1) | BR7202428D0 (en) |
| CH (1) | CH545576A (en) |
| DE (1) | DE2119913C3 (en) |
| FR (1) | FR2134020B1 (en) |
| GB (1) | GB1348734A (en) |
| IT (1) | IT957218B (en) |
| LU (1) | LU65212A1 (en) |
| NL (1) | NL7205092A (en) |
| SE (1) | SE374474B (en) |
| ZA (1) | ZA722573B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330296A (en) * | 1976-09-01 | 1978-03-22 | Seiko Instr & Electronics Ltd | Electro-acoustic transducer |
| FR2542552B1 (en) * | 1983-03-07 | 1986-04-11 | Thomson Csf | ELECTROACOUSTIC TRANSDUCER WITH PIEZOELECTRIC DIAPHRAGM |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE88657C (en) * | ||||
| FR1084139A (en) * | 1952-10-06 | 1955-01-17 | Condenser microphone for directional reception |
-
1971
- 1971-04-23 DE DE2119913A patent/DE2119913C3/en not_active Expired
-
1972
- 1972-03-22 CH CH423472A patent/CH545576A/xx not_active IP Right Cessation
- 1972-04-05 GB GB1556572A patent/GB1348734A/en not_active Expired
- 1972-04-14 NL NL7205092A patent/NL7205092A/xx unknown
- 1972-04-14 AT AT328772A patent/AT307530B/en not_active IP Right Cessation
- 1972-04-17 ZA ZA722573A patent/ZA722573B/en unknown
- 1972-04-18 AR AR241551A patent/AR192770A1/en active
- 1972-04-20 BR BR2428/72A patent/BR7202428D0/en unknown
- 1972-04-20 BG BG20267A patent/BG22860A3/xx unknown
- 1972-04-21 FR FR7214188A patent/FR2134020B1/fr not_active Expired
- 1972-04-21 IT IT7318/72A patent/IT957218B/en active
- 1972-04-21 LU LU65212D patent/LU65212A1/xx unknown
- 1972-04-21 BE BE782492A patent/BE782492A/en unknown
- 1972-04-24 SE SE7205376A patent/SE374474B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1348734A (en) | 1974-03-20 |
| DE2119913A1 (en) | 1972-11-09 |
| CH545576A (en) | 1974-01-31 |
| DE2119913C3 (en) | 1974-08-08 |
| IT957218B (en) | 1973-10-10 |
| LU65212A1 (en) | 1972-07-13 |
| BR7202428D0 (en) | 1973-06-28 |
| AR192770A1 (en) | 1973-03-14 |
| BG22860A3 (en) | 1977-04-20 |
| AT307530B (en) | 1973-05-25 |
| NL7205092A (en) | 1972-10-25 |
| SE374474B (en) | 1975-03-03 |
| ZA722573B (en) | 1973-01-31 |
| DE2119913B2 (en) | 1974-01-17 |
| FR2134020A1 (en) | 1972-12-01 |
| BE782492A (en) | 1972-10-23 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |