Granted Patent
Utility
US 4,450,205 · App. 06/399,802
Surface-coated blade member of super hard alloy for cutting tools and process for producing same
Inventors:
Takeshi Itaba, Shotaro Matsumoto, Takeshi Abe
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jul 19, 1982
Inventors
Takeshi Itaba
Shotaro Matsumoto
Takeshi Abe
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.