FR581461A - - Google Patents
Info
- Publication number
- FR581461A FR581461A FR581461DA FR581461A FR 581461 A FR581461 A FR 581461A FR 581461D A FR581461D A FR 581461DA FR 581461 A FR581461 A FR 581461A
- 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
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- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR581461A true FR581461A (xx) | 1924-11-29 |
Family
ID=1539641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR581461D Expired FR581461A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR581461A (xx) |
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0
- FR FR581461D patent/FR581461A/fr not_active Expired