CA782801A - Sound signalling device - Google Patents

Sound signalling device

Info

Publication number
CA782801A
CA782801A CA782801A CA782801DA CA782801A CA 782801 A CA782801 A CA 782801A CA 782801 A CA782801 A CA 782801A CA 782801D A CA782801D A CA 782801DA CA 782801 A CA782801 A CA 782801A
Authority
CA
Canada
Prior art keywords
signalling device
sound signalling
sound
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
CA782801A
Inventor
Doggart John
R. Lawton Geoffrey
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.)
V&E Friedland Ltd
Original Assignee
V&E Friedland Ltd
Publication date
Application granted granted Critical
Publication of CA782801A publication Critical patent/CA782801A/en
Expired legal-status Critical Current

Links

CA782801A Sound signalling device Expired CA782801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA782801T

Publications (1)

Publication Number Publication Date
CA782801A true CA782801A (en) 1968-04-16

Family

ID=36245475

Family Applications (1)

Application Number Title Priority Date Filing Date
CA782801A Expired CA782801A (en) Sound signalling device

Country Status (1)

Country Link
CA (1) CA782801A (en)

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