Granted Patent
Utility
US 4,337,300 · App. 06/176,272
Surface-coated blade member for cutting tools and process for producing same
Inventors:
Takeshi Itaba, Shotaro Matsumoto
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Aug 8, 1980
Inventors
Takeshi Itaba
Shotaro Matsumoto
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.