Lead gripping means for lead holders
United States Patent 2801613
US Patent References:
Mechanical pencil
- - 2262649


Inventors:
Giulio, Gigli
Publication Date:
08/06/1957
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Assignee:
L & C HARDTMUTH INC
Primary Class:
401/93
International Classes:
B43K21/22; B43K21/00
Foreign References:
DE176245C
DE852052C