Granted Patent
Utility
US 5,833,253 · App. 08/934,417
Locking mechanism for movable subframe of tractor-trailers
Inventor:
Timothy Hess
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Sep 19, 1997
Inventor
Timothy Hess
Assignee (at issue)
The Boler 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.