Granted Patent
Utility
US 4,565,334 · App. 06/670,668
Electrohydraulic drive for process line winders, unwinders and other equipment
Inventor:
Robert C. Ruhl
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Nov 13, 1984
Inventor
Robert C. Ruhl
Assignee (at issue)
Kennecott Holdings Company
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.