Granted Patent
Utility
US 6,368,462 · App. 09/579,220
Headbox for a paper or board making machine
Inventors:
Juhana Lumiala, Antti Poikolainen
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: May 26, 2000
Inventors
Juhana Lumiala
Antti Poikolainen
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.