FR799296A - Installation acoustique d'alarme - Google Patents
Installation acoustique d'alarmeInfo
- Publication number
- FR799296A FR799296A FR799296DA FR799296A FR 799296 A FR799296 A FR 799296A FR 799296D A FR799296D A FR 799296DA FR 799296 A FR799296 A FR 799296A
- Authority
- FR
- France
- Prior art keywords
- acoustic alarm
- alarm installation
- installation
- acoustic
- alarm
- 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
-
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE799296X | 1935-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR799296A true FR799296A (fr) | 1936-06-10 |
Family
ID=6711587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR799296D Expired FR799296A (fr) | 1935-03-12 | 1935-12-13 | Installation acoustique d'alarme |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR799296A (fr) |
-
1935
- 1935-12-13 FR FR799296D patent/FR799296A/fr not_active Expired
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