CA435648A - Ecran de projection - Google Patents

Ecran de projection

Info

Publication number
CA435648A
CA435648A CA435648A CA435648DA CA435648A CA 435648 A CA435648 A CA 435648A CA 435648 A CA435648 A CA 435648A CA 435648D A CA435648D A CA 435648DA CA 435648 A CA435648 A CA 435648A
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
CA435648A
Other languages
English (en)
Inventor
Hehn Otto
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.)
Sparks Withington Co
Original Assignee
Sparks Withington Co
Publication date
Application granted granted Critical
Publication of CA435648A publication Critical patent/CA435648A/fr
Expired legal-status Critical Current

Links

CA435648A Ecran de projection Expired CA435648A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA435648T

Publications (1)

Publication Number Publication Date
CA435648A true CA435648A (fr) 1946-07-02

Family

ID=35550282

Family Applications (1)

Application Number Title Priority Date Filing Date
CA435648A Expired CA435648A (fr) Ecran de projection

Country Status (1)

Country Link
CA (1) CA435648A (fr)

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