FR914880A - high frequency phone earphones - Google Patents
high frequency phone earphonesInfo
- Publication number
- FR914880A FR914880A FR914880DA FR914880A FR 914880 A FR914880 A FR 914880A FR 914880D A FR914880D A FR 914880DA FR 914880 A FR914880 A FR 914880A
- Authority
- FR
- France
- Prior art keywords
- high frequency
- frequency phone
- earphones
- phone earphones
- phone
- Prior art date
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/10—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR914880T | 1945-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR914880A true FR914880A (en) | 1946-10-21 |
Family
ID=9422501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR914880D Expired FR914880A (en) | 1945-04-20 | 1945-04-20 | high frequency phone earphones |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR914880A (en) |
-
1945
- 1945-04-20 FR FR914880D patent/FR914880A/en not_active Expired
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