Title:
Mechanical pencil
United States Patent 1905920


Inventors:
Lindemon, William H.
Application Number:
US51789831A
Publication Date:
04/25/1933
Filing Date:
02/24/1931
Assignee:
SHEAFFER W A PEN CO
Primary Class:
Other Classes:
206/38, 401/17, 401/34, 401/86, D19/164
International Classes:
B43K21/08; B43K27/02
View Patent Images: