Granted Patent
Utility
US 5,312,074 · App. 08/007,693
Safety mechanism for track system
Inventors:
Glen Keith, Steven James Hrivnak
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Jan 22, 1993
Inventors
Glen Keith
Steven James Hrivnak
Assignee (at issue)
Eastman Chemical Company
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.