FR716502A - screen for cinematographic sound projections - Google Patents

screen for cinematographic sound projections

Info

Publication number
FR716502A
FR716502A FR716502DA FR716502A FR 716502 A FR716502 A FR 716502A FR 716502D A FR716502D A FR 716502DA FR 716502 A FR716502 A FR 716502A
Authority
FR
France
Prior art keywords
screen
cinematographic
projections
sound projections
cinematographic sound
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
Alain-Victor-Francoi Marion
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 FR716502A publication Critical patent/FR716502A/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
    • G03B21/565—Screens allowing free passage of sound

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR716502D 1931-05-04 1931-05-04 screen for cinematographic sound projections Expired FR716502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR716502T 1931-05-04

Publications (1)

Publication Number Publication Date
FR716502A true FR716502A (en) 1931-12-22

Family

ID=9089575

Family Applications (1)

Application Number Title Priority Date Filing Date
FR716502D Expired FR716502A (en) 1931-05-04 1931-05-04 screen for cinematographic sound projections

Country Status (1)

Country Link
FR (1) FR716502A (en)

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