FR685003A - Folding projection screen - Google Patents

Folding projection screen

Info

Publication number
FR685003A
FR685003A FR685003DA FR685003A FR 685003 A FR685003 A FR 685003A FR 685003D A FR685003D A FR 685003DA FR 685003 A FR685003 A FR 685003A
Authority
FR
France
Prior art keywords
projection screen
folding projection
folding
screen
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
Other languages
French (fr)
Inventor
Pierre Collet
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR685003A publication Critical patent/FR685003A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR685003D 1929-11-15 1929-11-15 Folding projection screen Expired FR685003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR685003T 1929-11-15

Publications (1)

Publication Number Publication Date
FR685003A true FR685003A (en) 1930-07-03

Family

ID=9024768

Family Applications (1)

Application Number Title Priority Date Filing Date
FR685003D Expired FR685003A (en) 1929-11-15 1929-11-15 Folding projection screen

Country Status (1)

Country Link
FR (1) FR685003A (en)

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