FR963665A - - Google Patents
Info
- Publication number
- FR963665A FR963665A FR963665DA FR963665A FR 963665 A FR963665 A FR 963665A FR 963665D A FR963665D A FR 963665DA FR 963665 A FR963665 A FR 963665A
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR963665A true FR963665A (en) | 1950-07-18 |
Family
ID=1564752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR963665D Expired FR963665A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR963665A (en) |
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0
- FR FR963665D patent/FR963665A/fr not_active Expired