CA538887A - Pneumatic signalling - Google Patents

Pneumatic signalling

Info

Publication number
CA538887A
CA538887A CA538887A CA538887DA CA538887A CA 538887 A CA538887 A CA 538887A CA 538887 A CA538887 A CA 538887A CA 538887D A CA538887D A CA 538887DA CA 538887 A CA538887 A CA 538887A
Authority
CA
Canada
Prior art keywords
signalling
pneumatic
pneumatic 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
CA538887A
Other languages
French (fr)
Inventor
J. Poitras Edward
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 CA538887A publication Critical patent/CA538887A/en
Expired legal-status Critical Current

Links

CA538887A Pneumatic signalling Expired CA538887A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA538887T

Publications (1)

Publication Number Publication Date
CA538887A true CA538887A (en) 1957-04-02

Family

ID=35693529

Family Applications (1)

Application Number Title Priority Date Filing Date
CA538887A Expired CA538887A (en) Pneumatic signalling

Country Status (1)

Country Link
CA (1) CA538887A (en)

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