CA227638A - Ecran a projection d'images - Google Patents

Ecran a projection d'images

Info

Publication number
CA227638A
CA227638A CA227638A CA227638DA CA227638A CA 227638 A CA227638 A CA 227638A CA 227638 A CA227638 A CA 227638A CA 227638D A CA227638D A CA 227638DA CA 227638 A CA227638 A CA 227638A
Authority
CA
Canada
Prior art keywords
screen
picture projection
picture
projection
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
CA227638A
Other languages
English (en)
Inventor
Frederick Robert Treoger John
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 CA227638A publication Critical patent/CA227638A/fr
Expired legal-status Critical Current

Links

CA227638A Ecran a projection d'images Expired CA227638A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA227638T

Publications (1)

Publication Number Publication Date
CA227638A true CA227638A (fr) 1923-01-02

Family

ID=35123241

Family Applications (1)

Application Number Title Priority Date Filing Date
CA227638A Expired CA227638A (fr) Ecran a projection d'images

Country Status (1)

Country Link
CA (1) CA227638A (fr)

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