FI40808B - - Google Patents
Info
- Publication number
- FI40808B FI40808B FI2208/61A FI220861A FI40808B FI 40808 B FI40808 B FI 40808B FI 2208/61 A FI2208/61 A FI 2208/61A FI 220861 A FI220861 A FI 220861A FI 40808 B FI40808 B FI 40808B
- Authority
- FI
- Finland
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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES0072898 | 1961-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FI40808B true FI40808B (nl) | 1969-02-28 |
Family
ID=7503549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI2208/61A FI40808B (nl) | 1961-03-09 | 1961-12-15 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3239611A (nl) |
| BE (1) | BE614837A (nl) |
| CH (1) | CH403864A (nl) |
| DE (1) | DE1416334B2 (nl) |
| DK (1) | DK117782B (nl) |
| FI (1) | FI40808B (nl) |
| NL (2) | NL275714A (nl) |
| SE (1) | SE300021B (nl) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3624315A (en) * | 1967-01-23 | 1971-11-30 | Max E Broce | Transducer apparatus and transducer amplifier system utilizing insulated gate semiconductor field effect devices |
| US3673354A (en) * | 1969-05-08 | 1972-06-27 | Matsushita Electric Ind Co Ltd | Semiconductor stress transducer |
| US3691316A (en) * | 1969-05-09 | 1972-09-12 | Matsushita Electric Ind Co Ltd | Semiconductor stress transducer |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2171793A (en) * | 1937-02-24 | 1939-09-05 | Aurex Corp | Microphone |
| GB678766A (en) * | 1950-05-24 | 1952-09-10 | Fortiphone Ltd | Improvements in or relating to microphones |
| DE970420C (de) * | 1951-03-10 | 1958-09-18 | Siemens Ag | Elektrisches Halbleitergeraet |
| DE1006169B (de) * | 1952-02-07 | 1957-04-11 | Siemes & Halske Ag | Anordnung zur Umwandlung mechanischer in elektrische Schwingungen |
| US2929885A (en) * | 1953-05-20 | 1960-03-22 | Rca Corp | Semiconductor transducers |
| US2866014A (en) * | 1955-10-31 | 1958-12-23 | Bell Telephone Labor Inc | Piezoresistive acoustic transducer |
| US2898477A (en) * | 1955-10-31 | 1959-08-04 | Bell Telephone Labor Inc | Piezoelectric field effect semiconductor device |
| US3003900A (en) * | 1957-11-12 | 1961-10-10 | Pacific Semiconductors Inc | Method for diffusing active impurities into semiconductor materials |
| US2907672A (en) * | 1958-08-25 | 1959-10-06 | Ford Motor Co | Aurous coating on an optical element |
| US3031634A (en) * | 1960-04-04 | 1962-04-24 | Century Geophysical Corp | Strain gauge |
-
0
- NL NL275027D patent/NL275027A/xx unknown
- NL NL275714D patent/NL275714A/xx unknown
-
1961
- 1961-03-09 DE DE19611416334 patent/DE1416334B2/de active Pending
- 1961-12-07 CH CH1428561A patent/CH403864A/de unknown
- 1961-12-15 FI FI2208/61A patent/FI40808B/fi active
-
1962
- 1962-02-16 DK DK73962AA patent/DK117782B/da unknown
- 1962-03-07 US US178785A patent/US3239611A/en not_active Expired - Lifetime
- 1962-03-08 SE SE2594/62A patent/SE300021B/xx unknown
- 1962-03-08 BE BE614837A patent/BE614837A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL275714A (nl) | 1900-01-01 |
| DE1416334B2 (de) | 1972-09-28 |
| DK117782B (da) | 1970-06-01 |
| NL275027A (nl) | |
| SE300021B (nl) | 1968-04-01 |
| CH403864A (de) | 1965-12-15 |
| US3239611A (en) | 1966-03-08 |
| BE614837A (fr) | 1962-09-10 |
| DE1416334A1 (de) | 1969-01-09 |