Title:
Automatic pencil
United States Patent 1621990


Inventors:
Lippert, Leo H.
Ragnvald, Bergeson
Application Number:
US74969924A
Publication Date:
03/22/1927
Filing Date:
11/13/1924
Assignee:
Lippert, Leo H.
Ragnvald, Bergeson
Primary Class:
Other Classes:
401/85
International Classes:
B43K21/08
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