Sheet material
United States Patent 2214231

Inventors:
Ketter, Grace P.
George, Wagner
Publication Date:
09/10/1940
View Patent Images:
Download PDF 2214231 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Ketter, Grace P.
George, Wagner
Primary Class:
428/350
Other Classes:
451/442, 428/355R, 106/146.500
International Classes:
B41N1/24; C09J7/04; D21H17/22; D21H17/00