Granted Patent
Utility
US 6,071,047 · App. 08/945,291
Method and apparatus for feeding coolant liquid and separating and recovering it in cutting machine and grinding machine
Inventor:
Yoshikazu Nakai
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Oct 14, 1997
Inventor
Yoshikazu Nakai
Assignee (at issue)
Zeta Heiwa Ltd.
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.