Granted Patent
Utility
US 6,620,108 · App. 10/033,636
Apparatus and method for determining machine operator status
Inventors:
Landon Duval, Ronald L. Williams
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Dec 26, 2001
Inventors
Landon Duval
Ronald L. Williams
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.