Model for atomic forms
United States Patent 3276148

Inventors:
Snelson, Kenneth D.
Publication Date:
10/04/1966
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Assignee:
Snelson, Kenneth D.
Primary Class:
Other Classes:
52/DIG.010, 446/138
International Classes:
G09B23/26; G09B23/00
Foreign References:
FR55975A
GB346126A
GB750514A