Granted Patent
Utility
US 5,804,706 · App. 08/794,325
System and method for measuring the mar resistance of materials
Inventor:
Ralph H. Williston
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Feb 3, 1997
Inventor
Ralph H. Williston
Assignee (at issue)
O'Sullivan Industries, 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.