FR742617A - - Google Patents
Info
- Publication number
- FR742617A FR742617A FR742617DA FR742617A FR 742617 A FR742617 A FR 742617A FR 742617D A FR742617D A FR 742617DA FR 742617 A FR742617 A FR 742617A
- 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
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742617A true FR742617A (it) | 1933-03-10 |
Family
ID=1547006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742617D Expired FR742617A (it) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742617A (it) |
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0
- FR FR742617D patent/FR742617A/fr not_active Expired