Granted Patent
Utility
US 6,386,147 · App. 09/467,887
Operating cylinder
Inventor:
Rene Fransen
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Dec 21, 1999
Inventor
Rene Fransen
Assignee (at issue)
MAASLAND N.V.
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.