FR546492A - - Google Patents
Info
- Publication number
- FR546492A FR546492A FR546492DA FR546492A FR 546492 A FR546492 A FR 546492A FR 546492D A FR546492D A FR 546492DA FR 546492 A FR546492 A FR 546492A
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR546492A true FR546492A (ja) | 1922-11-14 |
Family
ID=1537943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR546492D Expired FR546492A (ja) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR546492A (ja) |
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0
- FR FR546492D patent/FR546492A/fr not_active Expired