Granted Patent
Utility
US 4,816,163 · App. 07/135,503
Method for controlling macroinvertebrates
Inventors:
Larry A. Lyons, Dwight P. Davis, Paul Swered
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Dec 18, 1987
Inventors
Larry A. Lyons
Dwight P. Davis
Paul Swered
Assignee (at issue)
Betz Laboratories, 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.