FR721086A - projection screens - Google Patents

projection screens

Info

Publication number
FR721086A
FR721086A FR721086DA FR721086A FR 721086 A FR721086 A FR 721086A FR 721086D A FR721086D A FR 721086DA FR 721086 A FR721086 A FR 721086A
Authority
FR
France
Prior art keywords
projection screens
screens
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
Clarence Whitney Kanolt
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 FR721086A publication Critical patent/FR721086A/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)
FR721086D 1930-08-08 1931-08-05 projection screens Expired FR721086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US721086XA 1930-08-08 1930-08-08

Publications (1)

Publication Number Publication Date
FR721086A true FR721086A (en) 1932-02-27

Family

ID=22105621

Family Applications (1)

Application Number Title Priority Date Filing Date
FR721086D Expired FR721086A (en) 1930-08-08 1931-08-05 projection screens

Country Status (1)

Country Link
FR (1) FR721086A (en)

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