Granted Patent
Utility
US 6,306,319 · App. 09/361,632
Method of determining wear
Inventors:
Robert Swain, Ralph Stanziola
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Jul 19, 1999
Inventors
Robert Swain
Ralph Stanziola
Assignee (at issue)
Chroma Group, 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.