Granted Patent
Utility
US 5,171,139 · App. 07/798,383
Moineau motor with conduits through the stator
Inventors:
Lance D. Underwood, Harold D. Johnson, Charles H. Dewey, Mark J. Hommel
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: Nov 26, 1991
Inventors
Lance D. Underwood
Harold D. Johnson
Charles H. Dewey
Mark J. Hommel
Assignee (at issue)
SMITH INTERNATIONAL, 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.