Granted Patent
Utility
US 4,844,738 · App. 07/109,820
Carbide-dispersed type Fe-base sintered alloy excellent in wear resistance
Inventors:
Teruyoshi Tanase, Hatiro Matsunaga
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Oct 16, 1987
Inventors
Teruyoshi Tanase
Hatiro Matsunaga
Assignee (at issue)
Mitsubishi Kinzoku Kabushiki Kaisha
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.