CA646504A - Earphone - Google Patents

Earphone

Info

Publication number
CA646504A
CA646504A CA646504DA CA646504A CA 646504 A CA646504 A CA 646504A CA 646504D A CA646504D A CA 646504DA CA 646504 A CA646504 A CA 646504A
Authority
CA
Canada
Prior art keywords
earphone
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
Inventor
A. G. Shaw Edgar
J. Thiessen George
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.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
Publication date
Application granted granted Critical
Publication of CA646504A publication Critical patent/CA646504A/en
Expired legal-status Critical Current

Links

CA646504D Earphone Expired CA646504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA646504T

Publications (1)

Publication Number Publication Date
CA646504A true CA646504A (en) 1962-08-14

Family

ID=35935158

Family Applications (1)

Application Number Title Priority Date Filing Date
CA646504D Expired CA646504A (en) Earphone

Country Status (1)

Country Link
CA (1) CA646504A (en)

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