Granted Patent
Utility
US 4,795,172 · App. 07/129,492
Grease seal for a power screw system
Inventor:
David Brande
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Dec 7, 1987
Inventor
David Brande
Assignee (at issue)
Cincinnatti Milacron 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.