BE643583A - - Google Patents

Info

Publication number
BE643583A
BE643583A BE643583A BE643583A BE643583A BE 643583 A BE643583 A BE 643583A BE 643583 A BE643583 A BE 643583A BE 643583 A BE643583 A BE 643583A BE 643583 A BE643583 A BE 643583A
Authority
BE
Belgium
Prior art keywords
support post
rod
push rod
feet
extension rod
Prior art date
Application number
BE643583A
Other languages
English (en)
French (fr)
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
Priority to BE643583A priority Critical patent/BE643583A/fr
Publication of BE643583A publication Critical patent/BE643583A/fr

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
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
BE643583A 1964-02-10 1964-02-10 BE643583A (enrdf_load_stackoverflow)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE643583A BE643583A (enrdf_load_stackoverflow) 1964-02-10 1964-02-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE643583A BE643583A (enrdf_load_stackoverflow) 1964-02-10 1964-02-10

Publications (1)

Publication Number Publication Date
BE643583A true BE643583A (enrdf_load_stackoverflow) 1964-05-29

Family

ID=3845899

Family Applications (1)

Application Number Title Priority Date Filing Date
BE643583A BE643583A (enrdf_load_stackoverflow) 1964-02-10 1964-02-10

Country Status (1)

Country Link
BE (1) BE643583A (enrdf_load_stackoverflow)

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