Portable planetarium
United States Patent 3250024

Inventors:
Douthitt, Claude A.
Wilson, Myron I.
Publication Date:
05/10/1966
View Patent Images:
Download PDF 3250024 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Fred, Long S.
Richard, Caro L.
Primary Class:
434/286
Other Classes:
52/2.140
International Classes:
G09B27/02; G09B27/00
Foreign References:
FR1679A
IT575930B