Process of making pressure sensitive record material
United States Patent 2505487
Inventors:
Green, Barrett K.
Publication Date:
04/25/1950
View Patent Images:
Export Citation:
Assignee:
NCR CO
Primary Class:
Other Classes:
503/220, 552/106, 552/103, 427/152
International Classes:
B41M5/136; B41M5/132
Foreign References:
| GB550332A |