FR743471A - - Google Patents
Info
- Publication number
- FR743471A FR743471A FR743471DA FR743471A FR 743471 A FR743471 A FR 743471A FR 743471D A FR743471D A FR 743471DA FR 743471 A FR743471 A FR 743471A
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR743471A true FR743471A (en) | 1933-03-31 |
Family
ID=1547725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR743471D Expired FR743471A (en) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR743471A (en) |
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0
- FR FR743471D patent/FR743471A/fr not_active Expired