Granted Patent
Utility
US 4,806,083 · App. 06/921,315
Submersible pump with expanded foam housing
Inventors:
Nyle D. LaGrange, Darryl M. Nielsen, Terry A. Peterson
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Oct 21, 1986
Inventors
Nyle D. LaGrange
Darryl M. Nielsen
Terry A. Peterson
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.