Toy planetarium
United States Patent 3387393
US Patent References:
/0122954.html
- - 0122954

/0749508.html
- - 0749508

Astronomical clock
- - 1770820

Planetarium
- - 2226032

Educational appliance
- - 2418718


Inventors:
Musser, Clair O.
Publication Date:
06/11/1968
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Primary Class:
434/291
Other Classes:
446/136
International Classes:
G09B27/02; G09B27/00
US Patent References:
2594678Magnetic racing amusement device
2786680Racing games
2949682Satellite orbit toys
3286374Planetarium
Foreign References:
CH379164A