CA224942A - Avertisseur de semaphore - Google Patents

Avertisseur de semaphore

Info

Publication number
CA224942A
CA224942A CA224942A CA224942DA CA224942A CA 224942 A CA224942 A CA 224942A CA 224942 A CA224942 A CA 224942A CA 224942D A CA224942D A CA 224942DA CA 224942 A CA224942 A CA 224942A
Authority
CA
Canada
Prior art keywords
semaphores
alarm
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
CA224942A
Other languages
English (en)
Inventor
Daniel Childerhose Arthur
William Gutteridge Charles
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA224942A publication Critical patent/CA224942A/fr
Expired legal-status Critical Current

Links

CA224942A Avertisseur de semaphore Expired CA224942A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA224942T

Publications (1)

Publication Number Publication Date
CA224942A true CA224942A (fr) 1922-10-17

Family

ID=35120545

Family Applications (1)

Application Number Title Priority Date Filing Date
CA224942A Expired CA224942A (fr) Avertisseur de semaphore

Country Status (1)

Country Link
CA (1) CA224942A (fr)

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