Granted Patent
Utility
US 5,857,331 · App. 08/933,438
Hydraulic system
Inventors:
Carsten Christensen, Carl Christian Dixen
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Sep 18, 1997
Inventors
Carsten Christensen
Carl Christian Dixen
Assignee (at issue)
DANFOSS A/S
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.