Granted Patent
Utility
US 5,092,821 · App. 07/467,028
Drive system for impeller shafts
Inventors:
Ronald E. Gilbert, David M. Masarin, George S. Mordue
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jan 18, 1990
Inventors
Ronald E. Gilbert
David M. Masarin
George S. Mordue
Assignee (at issue)
Carborundum Corporation
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.