Granted Patent
Utility
US 4,636,252 · App. 06/609,892
Method of manufacturing a high toughness cermet for use in cutting tools
Inventors:
Hironori Yoshimura, Jhunichi Toyama
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: May 14, 1984
Inventors
Hironori Yoshimura
Jhunichi Toyama
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.