Granted Patent
Utility
US 4,906,385 · App. 07/305,231
Method for controlling macroinvertebrates
Inventors:
Larry A. Lyons, Dwight P. Davis, Paul Swered
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Feb 1, 1989
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.