FR818603A - Warning device - Google Patents
Warning deviceInfo
- Publication number
- FR818603A FR818603A FR818603DA FR818603A FR 818603 A FR818603 A FR 818603A FR 818603D A FR818603D A FR 818603DA FR 818603 A FR818603 A FR 818603A
- Authority
- FR
- France
- Prior art keywords
- warning device
- warning
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
- H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US818603XA | 1937-02-04 | 1937-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR818603A true FR818603A (en) | 1937-09-30 |
Family
ID=22166867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR818603D Expired FR818603A (en) | 1937-02-04 | 1937-03-01 | Warning device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR818603A (en) |
-
1937
- 1937-03-01 FR FR818603D patent/FR818603A/en not_active Expired
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