Poster
United States Patent 1519934

Inventors:
Thurston, Ross Claire
Publication Date:
12/16/1924
View Patent Images:
Download PDF 1519934 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Thurston, Ross Claire
Primary Class:
434/395
Other Classes:
446/387
International Classes:
G09F5/04; G09F5/00