CA391701A - Electrical speaking device - Google Patents

Electrical speaking device

Info

Publication number: CA391701A
Authority: CA; Canada
Prior art keywords: electrical; speaking device; speaking; electrical speaking
Prior art date: 1940-10-01
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

1940-10-01

1940-10-01 Application granted granted Critical

1940-10-01 Publication of CA391701A publication Critical patent/CA391701A/en

Status 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)

0
- CA CA391701A patent/CA391701A/en not_active Expired

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