CA371054A - Masque d'ecran de projection - Google Patents

Masque d'ecran de projection

Info

Publication number
CA371054A
CA371054A CA371054A CA371054DA CA371054A CA 371054 A CA371054 A CA 371054A CA 371054 A CA371054 A CA 371054A CA 371054D A CA371054D A CA 371054DA CA 371054 A CA371054 A CA 371054A
Authority
CA
Canada
Prior art keywords
projection screen
masking device
screen masking
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
CA371054A
Other languages
English (en)
Inventor
Harper Martin
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 CA371054A publication Critical patent/CA371054A/fr
Expired legal-status Critical Current

Links

CA371054A Masque d'ecran de projection Expired CA371054A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA371054T

Publications (1)

Publication Number Publication Date
CA371054A true CA371054A (fr) 1938-01-04

Family

ID=35372120

Family Applications (1)

Application Number Title Priority Date Filing Date
CA371054A Expired CA371054A (fr) Masque d'ecran de projection

Country Status (1)

Country Link
CA (1) CA371054A (fr)

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