Granted Patent
Utility
US 4,746,134 · App. 07/028,448
Plastic wheeled cart chassis having a reinforced structure
Inventor:
Houston Rehrig
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Mar 20, 1987
Inventor
Houston Rehrig
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.