Granted Patent
Utility
US 4,430,403 · App. 06/362,541
Method of preparing a lithographic printing master
Inventors:
Virgil W. Westdale, James L. Hanrahan
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Mar 26, 1982
Inventors
Virgil W. Westdale
James L. Hanrahan
Assignee (at issue)
AM International, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.