CA423507A - Systeme de transmission telephonique - Google Patents

Systeme de transmission telephonique

Info

Publication number
CA423507A
CA423507A CA423507A CA423507DA CA423507A CA 423507 A CA423507 A CA 423507A CA 423507 A CA423507 A CA 423507A CA 423507D A CA423507D A CA 423507DA CA 423507 A CA423507 A CA 423507A
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
CA423507A
Other languages
English (en)
Inventor
Harry Herrick Roswell
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 CA423507A publication Critical patent/CA423507A/fr
Expired legal-status Critical Current

Links

CA423507A Systeme de transmission telephonique Expired CA423507A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA423507T

Publications (1)

Publication Number Publication Date
CA423507A true CA423507A (fr) 1944-10-31

Family

ID=35534511

Family Applications (1)

Application Number Title Priority Date Filing Date
CA423507A Expired CA423507A (fr) Systeme de transmission telephonique

Country Status (1)

Country Link
CA (1) CA423507A (fr)

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