Granted Patent
Utility
US 6,371,117 · App. 09/328,466
Directional valve
Inventors:
Bjorn Lindqvist, Christian Rossby
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Jun 9, 1999
Inventors
Bjorn Lindqvist
Christian Rossby
Assignee (at issue)
Siemens Elema AB
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.