Title:
Typewriter ribbon feed mechanism
United States Patent 2554028


Inventors:
Helmond, William F.
Application Number:
US6474948A
Publication Date:
05/22/1951
Filing Date:
12/11/1948
Assignee:
UNDERWOOD CORP
Primary Class:
Other Classes:
400/219.5, 400/221.1, 400/227, 400/248
International Classes:
B41J3/24
View Patent Images:
US Patent References:
2127812Typewriting machine1938-08-23
0952281N/A1910-03-15