Granted Patent
Utility
US 5,068,148 · App. 07/454,513
Diamond-coated tool member, substrate thereof and method for producing same
Inventors:
Kei Nakahara, Keiichi Sakurai, Toshihiko Okamura, Hironori Yoshimura, Hiroyuki Eto, Noribumi Kikuchi
Patented Case
View Patent ↗
Granted: Nov 26, 1991
Filed: Dec 21, 1989
Inventors
Kei Nakahara
Keiichi Sakurai
Toshihiko Okamura
Hironori Yoshimura
Hiroyuki Eto
Noribumi Kikuchi
Assignee (at issue)
Mitsubishi Metal 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.