CA391701A - Electrical speaking device - Google Patents

Electrical speaking device

Info

Publication number
CA391701A
CA391701A CA391701A CA391701DA CA391701A CA 391701 A CA391701 A CA 391701A CA 391701 A CA391701 A CA 391701A CA 391701D A CA391701D A CA 391701DA CA 391701 A CA391701 A CA 391701A
Authority
CA
Canada
Prior art keywords
electrical
speaking device
speaking
electrical speaking
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
CA391701A
Other languages
French (fr)
Inventor
Findlay Albert
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.)
JOHN B FROSST
Original Assignee
JOHN B FROSST
Publication date
Application granted granted Critical
Publication of CA391701A publication Critical patent/CA391701A/en
Expired legal-status Critical Current

Links

CA391701A Electrical speaking device Expired CA391701A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA391701T

Publications (1)

Publication Number Publication Date
CA391701A true CA391701A (en) 1940-10-01

Family

ID=35399237

Family Applications (1)

Application Number Title Priority Date Filing Date
CA391701A Expired CA391701A (en) Electrical speaking device

Country Status (1)

Country Link
CA (1) CA391701A (en)

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