BE458082A - - Google Patents

Info

Publication number
BE458082A
BE458082A BE458082DA BE458082A BE 458082 A BE458082 A BE 458082A BE 458082D A BE458082D A BE 458082DA BE 458082 A BE458082 A BE 458082A
Authority
BE
Belgium
Prior art keywords
map
sky
transparent boards
shutter
phosphorescent
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE458082A publication Critical patent/BE458082A/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B27/00—Planetaria; Globes
    • G09B27/04—Star maps

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Electrically Operated Instructional Devices (AREA)
BE458082D BE458082A (cs)

Publications (1)

Publication Number Publication Date
BE458082A true BE458082A (cs)

Family

ID=111444

Family Applications (1)

Application Number Title Priority Date Filing Date
BE458082D BE458082A (cs)

Country Status (1)

Country Link
BE (1) BE458082A (cs)

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