Granted Patent
Utility
US 4,843,910 · App. 07/109,739
Pinion gear speed disc brake
Inventors:
Frederick W. Loeber, Terrence L. Doden, Ronald R. Massie
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Oct 19, 1987
Inventors
Frederick W. Loeber
Terrence L. Doden
Ronald R. Massie
Assignee (at issue)
Unit Rig & Equipment
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.