Granted Patent
Utility
US 5,623,726 · App. 08/499,190
Roll manufacture
Inventors:
Erkki Kiiski, Jari Liimatainen, Hannu Martikainen
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Jul 7, 1995
Inventors
Erkki Kiiski
Jari Liimatainen
Hannu Martikainen
Assignee (at issue)
Rauma Materials Technology OY
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.