Granted Patent
Utility
US 6,379,227 · App. 09/057,655
Abrasive-band grinding device and method for controlling an abrasive-band grinding device during grinding of faces of crowned rolls
Inventors:
Bjarne Hellman, Seppo Parviainen
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Apr 9, 1998
Inventors
Bjarne Hellman
Seppo Parviainen
Assignee (at issue)
Valmet Aktiebolag
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.