FR2104810B2 - - Google Patents
Info
- Publication number
- FR2104810B2 FR2104810B2 FR7127389A FR7127389A FR2104810B2 FR 2104810 B2 FR2104810 B2 FR 2104810B2 FR 7127389 A FR7127389 A FR 7127389A FR 7127389 A FR7127389 A FR 7127389A FR 2104810 B2 FR2104810 B2 FR 2104810B2
- 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3670670A GB1277913A (en) | 1970-07-29 | 1970-07-29 | Electro-acoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2104810A2 FR2104810A2 (it) | 1972-04-21 |
| FR2104810B2 true FR2104810B2 (it) | 1976-09-03 |
Family
ID=10390522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7127389A Expired FR2104810B2 (it) | 1970-07-29 | 1971-07-27 |
Country Status (4)
| Country | Link |
|---|---|
| ES (1) | ES393734A2 (it) |
| FR (1) | FR2104810B2 (it) |
| GB (1) | GB1277913A (it) |
| IT (1) | IT986816B (it) |
-
1970
- 1970-07-29 GB GB3670670A patent/GB1277913A/en not_active Expired
-
1971
- 1971-07-01 IT IT2649371A patent/IT986816B/it active
- 1971-07-27 FR FR7127389A patent/FR2104810B2/fr not_active Expired
- 1971-07-29 ES ES393734A patent/ES393734A2/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES393734A2 (es) | 1973-08-16 |
| FR2104810A2 (it) | 1972-04-21 |
| IT986816B (it) | 1975-01-30 |
| GB1277913A (en) | 1972-06-14 |