Granted Patent
Utility
US 4,997,344 · App. 07/394,609
Rotor bearing pre-load for a radial piston pump
Inventors:
Roger J. Nelson, Donald J. MacDonald, Arlen W. Koelling, William L. Snyder
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Aug 14, 1989
Inventors
Roger J. Nelson
Donald J. MacDonald
Arlen W. Koelling
William L. Snyder
Assignee (at issue)
DEERE & 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.