JPS5147416A - - Google Patents
Info
- Publication number
- JPS5147416A JPS5147416A JP50086101A JP8610175A JPS5147416A JP S5147416 A JPS5147416 A JP S5147416A JP 50086101 A JP50086101 A JP 50086101A JP 8610175 A JP8610175 A JP 8610175A JP S5147416 A JPS5147416 A JP S5147416A
- Authority
- JP
- Japan
- 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.)
- Pending
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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US512190A US3909558A (en) | 1974-10-07 | 1974-10-07 | Electromechanical amplifier sound transducer with combined power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5147416A true JPS5147416A (OSRAM) | 1976-04-23 |
Family
ID=24038069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50086101A Pending JPS5147416A (OSRAM) | 1974-10-07 | 1975-07-14 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3909558A (OSRAM) |
| JP (1) | JPS5147416A (OSRAM) |
| DE (1) | DE2533890A1 (OSRAM) |
| FR (1) | FR2287822A1 (OSRAM) |
| IT (1) | IT1051133B (OSRAM) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968332A (en) * | 1975-06-05 | 1976-07-06 | Lawrence Peska Associates, Inc. | Toy carbon microphone |
| USD246369S (en) * | 1975-10-08 | 1977-11-15 | O'brien Deceased Gerard J | Tap transducer intercom |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US298286A (en) * | 1884-05-06 | Telephonic transmitter | ||
| DE44937C (de) * | V. M. BERTHOLD in Cambridgeport, Massach.,V. St. A | Neuerung an Batterie-Telephonen | ||
| US3136854A (en) * | 1962-04-16 | 1964-06-09 | Clark A Willick | Underwater telephone |
-
1974
- 1974-10-07 US US512190A patent/US3909558A/en not_active Expired - Lifetime
-
1975
- 1975-07-14 JP JP50086101A patent/JPS5147416A/ja active Pending
- 1975-07-28 FR FR7523477A patent/FR2287822A1/fr active Granted
- 1975-07-29 DE DE19752533890 patent/DE2533890A1/de active Pending
- 1975-10-07 IT IT83658/75A patent/IT1051133B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2287822A1 (fr) | 1976-05-07 |
| US3909558A (en) | 1975-09-30 |
| AU8256175A (en) | 1977-01-06 |
| DE2533890A1 (de) | 1976-04-08 |
| FR2287822B1 (OSRAM) | 1979-05-11 |
| IT1051133B (it) | 1981-04-21 |