FR731091A - Improvements to projection devices - Google Patents

Improvements to projection devices

Info

Publication number
FR731091A
FR731091A FR731091DA FR731091A FR 731091 A FR731091 A FR 731091A FR 731091D A FR731091D A FR 731091DA FR 731091 A FR731091 A FR 731091A
Authority
FR
France
Prior art keywords
projection devices
projection
devices
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
Louis-Henri Poutonnet
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 FR731091A publication Critical patent/FR731091A/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
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR731091D 1932-02-05 1932-02-05 Improvements to projection devices Expired FR731091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731091T 1932-02-05

Publications (1)

Publication Number Publication Date
FR731091A true FR731091A (en) 1932-08-29

Family

ID=9116906

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731091D Expired FR731091A (en) 1932-02-05 1932-02-05 Improvements to projection devices

Country Status (1)

Country Link
FR (1) FR731091A (en)

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