Granted Patent
Utility
US 5,111,733 · App. 07/665,382
Multiple stage hydraulic jack for use with telescopic jib
Inventor:
Robert Baraniak
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Mar 5, 1991
Inventor
Robert Baraniak
Assignee (at issue)
PPM 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.