BE640035A - - Google Patents
Info
- Publication number
- BE640035A BE640035A BE640035A BE640035A BE640035A BE 640035 A BE640035 A BE 640035A BE 640035 A BE640035 A BE 640035A BE 640035 A BE640035 A BE 640035A BE 640035 A BE640035 A BE 640035A
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Pressure Sensors (AREA)
- Silicon Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES82451A DE1168971B (de) | 1962-11-15 | 1962-11-15 | Anordnung zur Umwandlung mechanischer Schwingungen in elektrische |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE640035A true BE640035A (fr) | 1964-05-19 |
Family
ID=7510353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE640035A BE640035A (fr) | 1962-11-15 | 1963-11-18 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3335233A (fr) |
| AT (1) | AT240445B (fr) |
| BE (1) | BE640035A (fr) |
| CH (1) | CH421193A (fr) |
| DE (1) | DE1168971B (fr) |
| FR (1) | FR1391745A (fr) |
| GB (1) | GB993728A (fr) |
| NL (1) | NL300454A (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3611068A (en) * | 1970-05-20 | 1971-10-05 | Matsushita Electric Ind Co Ltd | Contactless pressure sensitive semiconductor switch |
| SE443483B (sv) * | 1983-01-14 | 1986-02-24 | Gustav Georg Arne Bolin | Mottagardon for ljudvagor bestaende av en resonansskiva och en for dennas av ljudvagorna framkallade svengningar reagerande piezoelektrisk mikrofon av kristalltyp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522521A (en) * | 1949-01-14 | 1950-09-19 | Bell Telephone Labor Inc | Thermal transistor microphone |
| US3009126A (en) * | 1960-06-07 | 1961-11-14 | Bell Telephone Labor Inc | Strain transducers |
| US3215568A (en) * | 1960-07-18 | 1965-11-02 | Bell Telephone Labor Inc | Semiconductor devices |
-
1962
- 1962-11-15 DE DES82451A patent/DE1168971B/de active Pending
-
1963
- 1963-09-16 CH CH1142563A patent/CH421193A/de unknown
- 1963-09-17 AT AT745263A patent/AT240445B/de active
- 1963-11-05 FR FR952720A patent/FR1391745A/fr not_active Expired
- 1963-11-13 NL NL300454A patent/NL300454A/xx unknown
- 1963-11-13 US US323313A patent/US3335233A/en not_active Expired - Lifetime
- 1963-11-14 GB GB44967/63A patent/GB993728A/en not_active Expired
- 1963-11-18 BE BE640035A patent/BE640035A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH421193A (de) | 1966-09-30 |
| AT240445B (de) | 1965-05-25 |
| GB993728A (en) | 1965-06-02 |
| US3335233A (en) | 1967-08-08 |
| DE1168971B (de) | 1964-04-30 |
| FR1391745A (fr) | 1965-03-12 |
| NL300454A (fr) | 1965-09-10 |