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CA1031480A - Mine paging and telephone system - Google Patents

Mine paging and telephone system

Info

Publication number
CA1031480A
CA1031480A CA235,413A CA235413A CA1031480A CA 1031480 A CA1031480 A CA 1031480A CA 235413 A CA235413 A CA 235413A CA 1031480 A CA1031480 A CA 1031480A
Authority
CA
Canada
Prior art keywords
paging
mine
telephone system
telephone
mine paging
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
CA235,413A
Other languages
French (fr)
Inventor
Paul B. Day
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.)
Gai Tronics Corp
Original Assignee
Gai Tronics Corp
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 Gai Tronics Corp filed Critical Gai Tronics Corp
Priority to CA235,413A priority Critical patent/CA1031480A/en
Application granted granted Critical
Publication of CA1031480A publication Critical patent/CA1031480A/en
Expired legal-status Critical Current

Links

CA235,413A 1975-09-15 1975-09-15 Mine paging and telephone system Expired CA1031480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA235,413A CA1031480A (en) 1975-09-15 1975-09-15 Mine paging and telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA235,413A CA1031480A (en) 1975-09-15 1975-09-15 Mine paging and telephone system

Publications (1)

Publication Number Publication Date
CA1031480A true CA1031480A (en) 1978-05-16

Family

ID=4104036

Family Applications (1)

Application Number Title Priority Date Filing Date
CA235,413A Expired CA1031480A (en) 1975-09-15 1975-09-15 Mine paging and telephone system

Country Status (1)

Country Link
CA (1) CA1031480A (en)

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