Granted Patent
Utility
US 6,698,342 · App. 10/089,427
Method for a multi-roll calender as well as a multi-roll calender
Inventors:
Antti Heikkinen, Pekka Linnonmaa
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Jun 26, 2002
Inventors
Antti Heikkinen
Pekka Linnonmaa
Assignee (at issue)
Metso Paper Inc.
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.