Title:
Pencil with mechanical means for advancing the lead thereof
United States Patent 2523568
Inventors:
Halverson, Ford W.
Publication Date:
09/26/1950
Export Citation:
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Assignee:
Halverson, Ford W.
Primary Class:
401/65
Other Classes:
74/1R, 74/162, 192/93C, 401/55
International Classes:
B43K21/22; B43K21/00
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US Patent References:
2375734N/A
2340665Mechanical pencil