Granted Patent
Utility
US 6,220,931 · App. 09/299,151
Feeding a grinding wheel in grinding method
Inventors:
Kenichiro Nishi, Mitsuru Nukui, Kazuo Nakajima, Shirou Murai, Toyotaka Wada
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Apr 26, 1999
Inventors
Kenichiro Nishi
Mitsuru Nukui
Kazuo Nakajima
Shirou Murai
Toyotaka Wada
Assignee (at issue)
Nippei Toyama 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.