Granted Patent
Utility
US 4,729,675 · App. 07/049,672
Downhole motor and bearing assembly
Inventors:
Kurt H. Trzeciak, William C. Maurer
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: May 13, 1987
Inventors
Kurt H. Trzeciak
William C. Maurer
Assignee (at issue)
Magna Tools, 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.