Granted Patent
Utility
US 6,158,335 · App. 09/390,005
Calender apparatus with a separating mechanism
Inventors:
Nils-Erik Safman, Thomas Berglind
Patented Case
View Patent ↗
Granted: Dec 12, 2000
Filed: Sep 3, 1999
Inventors
Nils-Erik Safman
Thomas Berglind
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.