FR533769A - Improvements in cinematographs - Google Patents

Improvements in cinematographs

Info

Publication number
FR533769A
FR533769A FR533769DA FR533769A FR 533769 A FR533769 A FR 533769A FR 533769D A FR533769D A FR 533769DA FR 533769 A FR533769 A FR 533769A
Authority
FR
France
Prior art keywords
cinematographs
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
Frank Barbour Wyatt
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 FR533769A publication Critical patent/FR533769A/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
    • G03B21/14—Details
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR533769D 1921-04-05 1921-04-05 Improvements in cinematographs Expired FR533769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR533769T 1921-04-05

Publications (1)

Publication Number Publication Date
FR533769A true FR533769A (en) 1922-03-10

Family

ID=8925098

Family Applications (1)

Application Number Title Priority Date Filing Date
FR533769D Expired FR533769A (en) 1921-04-05 1921-04-05 Improvements in cinematographs

Country Status (1)

Country Link
FR (1) FR533769A (en)

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