Granted Patent
Utility
US 5,493,861 · App. 08/175,440
Hydraulic system with pump and load
Inventor:
Welm Friedrichsen
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Jan 3, 1994
Inventor
Welm Friedrichsen
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.