Granted Patent
Utility
US 5,402,721 · App. 08/064,751
Vacuum printing plate roller
Inventor:
John Schultz
Patented Case
View Patent ↗
Granted: Apr 4, 1995
Filed: May 13, 1993
Inventor
John Schultz
Assignee (at issue)
COMCO Machinery, 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.