CA580870A - Ecran de projection - Google Patents

Ecran de projection

Info

Publication number
CA580870A
CA580870A CA580870A CA580870DA CA580870A CA 580870 A CA580870 A CA 580870A CA 580870 A CA580870 A CA 580870A CA 580870D A CA580870D A CA 580870DA CA 580870 A CA580870 A CA 580870A
Authority
CA
Canada
Prior art keywords
projection screen
projection
screen
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
CA580870A
Other languages
English (en)
Inventor
S. Harkness Thomas
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.)
Andrew Smith Harkness Ltd
Original Assignee
Andrew Smith Harkness Ltd
Publication date
Application granted granted Critical
Publication of CA580870A publication Critical patent/CA580870A/fr
Expired legal-status Critical Current

Links

CA580870A Ecran de projection Expired CA580870A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA580870T

Publications (1)

Publication Number Publication Date
CA580870A true CA580870A (fr) 1959-08-04

Family

ID=35760295

Family Applications (1)

Application Number Title Priority Date Filing Date
CA580870A Expired CA580870A (fr) Ecran de projection

Country Status (1)

Country Link
CA (1) CA580870A (fr)

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