CA429112A - Systeme de transmission telephonique - Google Patents

Systeme de transmission telephonique

Info

Publication number
CA429112A
CA429112A CA429112A CA429112DA CA429112A CA 429112 A CA429112 A CA 429112A CA 429112 A CA429112 A CA 429112A CA 429112D A CA429112D A CA 429112DA CA 429112 A CA429112 A CA 429112A
Authority
CA
Canada
Prior art keywords
transmission system
telephone transmission
telephone
transmission
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
CA429112A
Other languages
English (en)
Inventor
Harry Herrick Roswell
Original Assignee
Automatic Electric Laboratories Inc
Associated Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA429112A publication Critical patent/CA429112A/fr
Expired legal-status Critical Current

Links

CA429112A Systeme de transmission telephonique Expired CA429112A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA429112T

Publications (1)

Publication Number Publication Date
CA429112A true CA429112A (fr) 1945-07-31

Family

ID=35544104

Family Applications (1)

Application Number Title Priority Date Filing Date
CA429112A Expired CA429112A (fr) Systeme de transmission telephonique

Country Status (1)

Country Link
CA (1) CA429112A (fr)

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