FR589299A - - Google Patents
Info
- Publication number
- FR589299A FR589299A FR589299DA FR589299A FR 589299 A FR589299 A FR 589299A FR 589299D A FR589299D A FR 589299DA FR 589299 A FR589299 A FR 589299A
- 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
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR589299A true FR589299A (es) | 1925-05-26 |
Family
ID=1540010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR589299D Expired FR589299A (es) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR589299A (es) |
-
0
- FR FR589299D patent/FR589299A/fr not_active Expired