CA590048A - Headphone device - Google Patents

Headphone device

Info

Publication number
CA590048A
CA590048A CA590048A CA590048DA CA590048A CA 590048 A CA590048 A CA 590048A CA 590048 A CA590048 A CA 590048A CA 590048D A CA590048D A CA 590048DA CA 590048 A CA590048 A CA 590048A
Authority
CA
Canada
Prior art keywords
headphone device
headphone
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
CA590048A
Inventor
L. Di Mattia Alfred
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.)
Dictaphone Corp
Original Assignee
Dictaphone Corp
Publication date
Application granted granted Critical
Publication of CA590048A publication Critical patent/CA590048A/en
Expired legal-status Critical Current

Links

CA590048A Headphone device Expired CA590048A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA590048T

Publications (1)

Publication Number Publication Date
CA590048A true CA590048A (en) 1960-01-05

Family

ID=35803585

Family Applications (1)

Application Number Title Priority Date Filing Date
CA590048A Expired CA590048A (en) Headphone device

Country Status (1)

Country Link
CA (1) CA590048A (en)

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