Granted Patent
Utility
US 6,544,387 · App. 08/977,973
Multi-layer headbox for a paper/board machine
Inventors:
Jyrki Huovila, Juha Kinnunen, Ari Linsuri, Petri Nyberg
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Nov 25, 1997
Inventors
Jyrki Huovila
Juha Kinnunen
Ari Linsuri
Petri Nyberg
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.