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BE739288A - - Google Patents
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BE739288A - - Google Patents

Info

Publication number
BE739288A
BE739288A BE739288DA BE739288A BE 739288 A BE739288 A BE 739288A BE 739288D A BE739288D A BE 739288DA BE 739288 A BE739288 A BE 739288A
Authority
BE
Belgium
Prior art keywords
slides
display
hollow body
display unit
unit according
Prior art date
Application number
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
Publication of BE739288A publication Critical patent/BE739288A/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/04—Viewing or reading apparatus having collapsible parts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
BE739288D 1969-09-24 1969-09-24 BE739288A (sr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE739288 1969-09-24

Publications (1)

Publication Number Publication Date
BE739288A true BE739288A (sr) 1970-03-02

Family

ID=3855392

Family Applications (1)

Application Number Title Priority Date Filing Date
BE739288D BE739288A (sr) 1969-09-24 1969-09-24

Country Status (1)

Country Link
BE (1) BE739288A (sr)

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