FR40252E - Improvements to projection devices for advertising or other uses - Google Patents

Improvements to projection devices for advertising or other uses

Info

Publication number
FR40252E
FR40252E FR40252DA FR40252E FR 40252 E FR40252 E FR 40252E FR 40252D A FR40252D A FR 40252DA FR 40252 E FR40252 E FR 40252E
Authority
FR
France
Prior art keywords
advertising
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
Camille Contal
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 FR40252E publication Critical patent/FR40252E/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
    • G03B23/00—Devices for changing pictures in viewing apparatus or projectors
    • G03B23/02—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor
    • G03B23/06—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor with rotary movement

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR40252D 1931-05-06 1931-05-06 Improvements to projection devices for advertising or other uses Expired FR40252E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR40252T 1931-05-06

Publications (1)

Publication Number Publication Date
FR40252E true FR40252E (en) 1932-06-08

Family

ID=8676552

Family Applications (1)

Application Number Title Priority Date Filing Date
FR40252D Expired FR40252E (en) 1931-05-06 1931-05-06 Improvements to projection devices for advertising or other uses

Country Status (1)

Country Link
FR (1) FR40252E (en)

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