FR818603A - Warning device - Google Patents

Warning device

Info

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
Application number
Other languages
French (fr)
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.)
Filing date
Publication date
Application filed by SIGNAPHONE CORP OF AMERICA filed Critical SIGNAPHONE CORP OF AMERICA
Application granted granted Critical
Publication of FR818603A publication Critical patent/FR818603A/en
Expired legal-status Critical Current

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

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)

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