Granted Patent
Utility
US 6,439,446 · App. 09/726,490
Safety lockout for actuator shaft
Inventors:
Stephen J. Perry, Roy H. Sullivan, Eric Karl Litscher
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Dec 1, 2000
Inventors
Stephen J. Perry
Roy H. Sullivan
Eric Karl Litscher
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.