Granted Patent
Utility
US 6,609,539 · App. 09/960,579
Hydraulically operated directional control valve
Inventors:
Werner Reinelt, Michael Dettmers, Wolfgang Kobow
Patented Case
View Patent ↗
Granted: Aug 26, 2003
Filed: Sep 21, 2001
Inventors
Werner Reinelt
Michael Dettmers
Wolfgang Kobow
Assignee (at issue)
DBT GMBH
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.