FR684131A - Improvements to the speakers - Google Patents
Improvements to the speakersInfo
- Publication number
- FR684131A FR684131A FR684131DA FR684131A FR 684131 A FR684131 A FR 684131A FR 684131D A FR684131D A FR 684131DA FR 684131 A FR684131 A FR 684131A
- Authority
- FR
- France
- Prior art keywords
- speakers
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR684131T | 1929-09-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR684131A true FR684131A (en) | 1930-06-21 |
Family
ID=9024292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR684131D Expired FR684131A (en) | 1929-09-17 | 1929-09-17 | Improvements to the speakers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR684131A (en) |
-
1929
- 1929-09-17 FR FR684131D patent/FR684131A/en not_active Expired
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