BE354856A - - Google Patents

Info

Publication number
BE354856A
BE354856A BE354856DA BE354856A BE 354856 A BE354856 A BE 354856A BE 354856D A BE354856D A BE 354856DA BE 354856 A BE354856 A BE 354856A
Authority
BE
Belgium
Prior art keywords
lens
lamp
filaments
images
letters
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE354856A publication Critical patent/BE354856A/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
BE354856D BE354856A (ar)

Publications (1)

Publication Number Publication Date
BE354856A true BE354856A (ar)

Family

ID=29209

Family Applications (1)

Application Number Title Priority Date Filing Date
BE354856D BE354856A (ar)

Country Status (1)

Country Link
BE (1) BE354856A (ar)

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