CA891640A - Telephone monitor - Google Patents

Telephone monitor

Info

Publication number
CA891640A
CA891640A CA891640A CA891640DA CA891640A CA 891640 A CA891640 A CA 891640A CA 891640 A CA891640 A CA 891640A CA 891640D A CA891640D A CA 891640DA CA 891640 A CA891640 A CA 891640A
Authority
CA
Canada
Prior art keywords
telephone monitor
telephone
monitor
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
CA891640A
Inventor
J. Bonvallet Duane
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.)
GOVERNMENT OF UNITED STATES A RMY, Secretary of
Original Assignee
GOVERNMENT OF UNITED STATES A RMY, Secretary of
Publication date
Application granted granted Critical
Publication of CA891640A publication Critical patent/CA891640A/en
Expired legal-status Critical Current

Links

CA891640A Telephone monitor Expired CA891640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA891640T

Publications (1)

Publication Number Publication Date
CA891640A true CA891640A (en) 1972-01-25

Family

ID=36397744

Family Applications (1)

Application Number Title Priority Date Filing Date
CA891640A Expired CA891640A (en) Telephone monitor

Country Status (1)

Country Link
CA (1) CA891640A (en)

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