Granted Patent
Utility
US 4,637,545 · App. 06/715,638
Waste management system
Inventor:
Gene Stewart
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Mar 25, 1985
Inventor
Gene Stewart
Assignee (at issue)
Winfield Corporation
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.