Visible data system
United States Patent 2226976
Inventors:
Leaming, Silas T.
Publication Date:
12/31/1940
View Patent Images:
Export Citation:
Assignee:
Albert, Call E.
Primary Class:
Other Classes:
40/384, 206/39, 150/147, 40/124, 206/425
International Classes:
B42F17/00; B42F17/08