FR492401A - Improvements made to screens for cinematographic or other projections - Google Patents

Improvements made to screens for cinematographic or other projections

Info

Publication number
FR492401A
FR492401A FR492401A FR492401DA FR492401A FR 492401 A FR492401 A FR 492401A FR 492401 A FR492401 A FR 492401A FR 492401D A FR492401D A FR 492401DA FR 492401 A FR492401 A FR 492401A
Authority
FR
France
Prior art keywords
cinematographic
screens
projections
improvements made
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
FR492401A
Other languages
French (fr)
Inventor
Frank Heale
George Wallace Bryant
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
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 by Individual filed Critical Individual
Application granted granted Critical
Publication of FR492401A publication Critical patent/FR492401A/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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR492401A 1918-03-14 1918-10-19 Improvements made to screens for cinematographic or other projections Expired FR492401A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB492401X 1918-03-14

Publications (1)

Publication Number Publication Date
FR492401A true FR492401A (en) 1919-07-08

Family

ID=1528279

Family Applications (1)

Application Number Title Priority Date Filing Date
FR492401A Expired FR492401A (en) 1918-03-14 1918-10-19 Improvements made to screens for cinematographic or other projections

Country Status (1)

Country Link
FR (1) FR492401A (en)

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