Granted Patent
Utility
US 4,679,991 · App. 06/820,692
Submersible pump and wastewater basin apparatus
Inventors:
Joe A. Harbison, Nyle D. LaGrange, Darryl M. Nielsen
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Jan 21, 1986
Inventors
Joe A. Harbison
Nyle D. LaGrange
Darryl M. Nielsen
Assignee (at issue)
The Marley-Wylain Company
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.