Granted Patent
Utility
US 4,391,641 · App. 06/318,719
Sintered powder metal friction material
Inventor:
Herbert W. Lloyd
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Nov 6, 1981
Inventor
Herbert W. Lloyd
Assignee (at issue)
Abex Corporation
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.