IT939691B - Sistema di allarme attraverso circuiti telefonici - Google Patents

Sistema di allarme attraverso circuiti telefonici

Info

Publication number
IT939691B
IT939691B IT5377971A IT5377971A IT939691B IT 939691 B IT939691 B IT 939691B IT 5377971 A IT5377971 A IT 5377971A IT 5377971 A IT5377971 A IT 5377971A IT 939691 B IT939691 B IT 939691B
Authority
IT
Italy
Prior art keywords
alarm system
telephone circuits
telephone
circuits
alarm
Prior art date
Application number
IT5377971A
Other languages
English (en)
Original Assignee
Brown Preston Reaves
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 Brown Preston Reaves filed Critical Brown Preston Reaves
Application granted granted Critical
Publication of IT939691B publication Critical patent/IT939691B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT5377971A 1970-11-05 1971-10-29 Sistema di allarme attraverso circuiti telefonici IT939691B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8726770A 1970-11-05 1970-11-05

Publications (1)

Publication Number Publication Date
IT939691B true IT939691B (it) 1973-02-10

Family

ID=22204134

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5377971A IT939691B (it) 1970-11-05 1971-10-29 Sistema di allarme attraverso circuiti telefonici

Country Status (10)

Country Link
AU (1) AU464402B2 (it)
BE (1) BE774634A (it)
CA (1) CA932884A (it)
CH (1) CH555574A (it)
DE (1) DE2155156A1 (it)
ES (1) ES396721A1 (it)
FR (1) FR2112461B1 (it)
GB (1) GB1375579A (it)
IT (1) IT939691B (it)
NL (1) NL7115039A (it)

Also Published As

Publication number Publication date
DE2155156A1 (de) 1972-05-10
ES396721A1 (es) 1974-05-16
CA932884A (en) 1973-08-28
AU3500071A (en) 1973-05-03
BE774634A (fr) 1972-02-14
FR2112461A1 (it) 1972-06-16
CH555574A (fr) 1974-10-31
GB1375579A (it) 1974-11-27
NL7115039A (it) 1972-05-09
AU464402B2 (en) 1975-08-28
FR2112461B1 (it) 1976-03-26

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