FR828858A - Perfectionnements aux appareils de projection - Google Patents

Perfectionnements aux appareils de projection

Info

Publication number
FR828858A
FR828858A FR828858DA FR828858A FR 828858 A FR828858 A FR 828858A FR 828858D A FR828858D A FR 828858DA FR 828858 A FR828858 A FR 828858A
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
English (en)
Inventor
Edmund Pratt Zoltan Ta Verneur
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 FR828858A publication Critical patent/FR828858A/fr
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
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • G03B21/111—Projectors with built-in or built-on screen for microfilm reading of roll films

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR828858D 1936-11-06 1937-11-05 Perfectionnements aux appareils de projection Expired FR828858A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US828858XA 1936-11-06 1936-11-06

Publications (1)

Publication Number Publication Date
FR828858A true FR828858A (fr) 1938-06-01

Family

ID=22174071

Family Applications (1)

Application Number Title Priority Date Filing Date
FR828858D Expired FR828858A (fr) 1936-11-06 1937-11-05 Perfectionnements aux appareils de projection

Country Status (1)

Country Link
FR (1) FR828858A (fr)

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