FR818603A - Warning device - Google Patents

Warning device

Info

Publication number: FR818603A
Authority: FR; France
Prior art keywords: warning device; warning
Prior art date: 1937-02-04
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

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

SIGNAPHONE CORP OF AMERICA

Original Assignee

SIGNAPHONE CORP OF AMERICA

Priority date (The priority date 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 date listed.)

1937-02-04

Filing date

1937-03-01

Publication date

1937-09-30

1937-03-01 Application filed by SIGNAPHONE CORP OF AMERICA filed Critical SIGNAPHONE CORP OF AMERICA

1937-09-30 Application granted granted Critical

1937-09-30 Publication of FR818603A publication Critical patent/FR818603A/en

Status Expired legal-status Critical Current

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

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)

FR818603D 1937-02-04 1937-03-01 Warning device Expired FR818603A (en)

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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