CA219422A - Dispositif microphonique de signaux - Google Patents

Dispositif microphonique de signaux

Info

Publication number
CA219422A
CA219422A CA219422A CA219422DA CA219422A CA 219422 A CA219422 A CA 219422A CA 219422 A CA219422 A CA 219422A CA 219422D A CA219422D A CA 219422DA CA 219422 A CA219422 A CA 219422A
Authority
CA
Canada
Prior art keywords
microphonic
signalling device
signalling
microphonic signalling
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
CA219422A
Other languages
English (en)
Inventor
Gardner John
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.)
General Electric Co
Original Assignee
General Electric Co
Publication date
Application granted granted Critical
Publication of CA219422A publication Critical patent/CA219422A/fr
Expired legal-status Critical Current

Links

CA219422A Dispositif microphonique de signaux Expired CA219422A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA219422T

Publications (1)

Publication Number Publication Date
CA219422A true CA219422A (fr) 1922-06-06

Family

ID=35113866

Family Applications (1)

Application Number Title Priority Date Filing Date
CA219422A Expired CA219422A (fr) Dispositif microphonique de signaux

Country Status (1)

Country Link
CA (1) CA219422A (fr)

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