CA490733A - Dispositif amplificateur auxiliaire de telephone - Google Patents

Dispositif amplificateur auxiliaire de telephone

Info

Publication number
CA490733A
CA490733A CA490733A CA490733DA CA490733A CA 490733 A CA490733 A CA 490733A CA 490733 A CA490733 A CA 490733A CA 490733D A CA490733D A CA 490733DA CA 490733 A CA490733 A CA 490733A
Authority
CA
Canada
Prior art keywords
amplifying device
auxiliary amplifying
telephone auxiliary
telephone
auxiliary
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
CA490733A
Other languages
English (en)
Inventor
T. Mcwane Arthur
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA490733A publication Critical patent/CA490733A/fr
Expired legal-status Critical Current

Links

CA490733A Dispositif amplificateur auxiliaire de telephone Expired CA490733A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA490733T

Publications (1)

Publication Number Publication Date
CA490733A true CA490733A (fr) 1953-02-24

Family

ID=35630470

Family Applications (1)

Application Number Title Priority Date Filing Date
CA490733A Expired CA490733A (fr) Dispositif amplificateur auxiliaire de telephone

Country Status (1)

Country Link
CA (1) CA490733A (fr)

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