Title:
Printing ruler
United States Patent 3140548


Inventors:
Paparozzi, Frank M.
Application Number:
US15031161A
Publication Date:
07/14/1964
Filing Date:
11/06/1961
Assignee:
Paparozzi, Frank M.
Primary Class:
Other Classes:
D18/24
International Classes:
B43L13/20
View Patent Images:
US Patent References:
D134627N/A
D138592N/A
1899318Educational drawing instrument1933-02-28
1170174N/A1916-02-01