Granted Patent
Utility
US 4,452,141 · App. 06/400,538
Fountain-type porous roller with central bearing flange
Inventor:
John D. Mistyurik
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Jul 21, 1982
Inventor
John D. Mistyurik
Assignee (at issue)
Monarch Marking Systems, 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.