Granted Patent
Utility
US 4,898,524 · App. 07/302,431
Fluid driven rotary motor
Inventor:
James K. Butzen
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Jan 27, 1989
Inventor
James K. Butzen
Assignee (at issue)
Snap-on Tools 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.