Granted Patent
Utility
US 4,889,290 · App. 07/316,088
Waste disposal apparatus
Inventors:
Robert Koffsky, Finn Pedersen
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Feb 27, 1989
Inventors
Robert Koffsky
Finn Pedersen
Assignee (at issue)
Affald International Inc.
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.