CA471241A - Dispositifs de projection lumineuse de signaux - Google Patents

Dispositifs de projection lumineuse de signaux

Info

Publication number
CA471241A
CA471241A CA471241A CA471241DA CA471241A CA 471241 A CA471241 A CA 471241A CA 471241 A CA471241 A CA 471241A CA 471241D A CA471241D A CA 471241DA CA 471241 A CA471241 A CA 471241A
Authority
CA
Canada
Prior art keywords
signal light
light projection
projection devices
devices
signal
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
CA471241A
Other languages
English (en)
Inventor
Porter Hallie
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.)
MARSHALL CRUMMIE
Original Assignee
MARSHALL CRUMMIE
Publication date
Application granted granted Critical
Publication of CA471241A publication Critical patent/CA471241A/fr
Expired legal-status Critical Current

Links

CA471241A Dispositifs de projection lumineuse de signaux Expired CA471241A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA471241T

Publications (1)

Publication Number Publication Date
CA471241A true CA471241A (fr) 1951-01-30

Family

ID=35605187

Family Applications (1)

Application Number Title Priority Date Filing Date
CA471241A Expired CA471241A (fr) Dispositifs de projection lumineuse de signaux

Country Status (1)

Country Link
CA (1) CA471241A (fr)

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