CA806751A - Apartment telephone-intercom and door release system - Google Patents

Apartment telephone-intercom and door release system

Info

Publication number
CA806751A
CA806751A CA806751A CA806751DA CA806751A CA 806751 A CA806751 A CA 806751A CA 806751 A CA806751 A CA 806751A CA 806751D A CA806751D A CA 806751DA CA 806751 A CA806751 A CA 806751A
Authority
CA
Canada
Prior art keywords
intercom
release system
door release
apartment
telephone
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
CA806751A
Inventor
T. Matthews John
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA806751A publication Critical patent/CA806751A/en
Expired legal-status Critical Current

Links

CA806751A Apartment telephone-intercom and door release system Expired CA806751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA806751T

Publications (1)

Publication Number Publication Date
CA806751A true CA806751A (en) 1969-02-18

Family

ID=36277253

Family Applications (1)

Application Number Title Priority Date Filing Date
CA806751A Expired CA806751A (en) Apartment telephone-intercom and door release system

Country Status (1)

Country Link
CA (1) CA806751A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937855A (en) * 1988-02-09 1990-06-26 Viscount Industries Limited Building security system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937855A (en) * 1988-02-09 1990-06-26 Viscount Industries Limited Building security system

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