Granted Patent
Utility
US 4,464,093 · App. 05/950,005
Power shovel having improed hoist system
Inventors:
George B. Baron, George J. Thompson
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Oct 6, 1978
Inventors
George B. Baron
George J. Thompson
Assignee (at issue)
Dresser Industries, Inc.
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.