Granted Patent
Utility
US 4,046,484 · App. 05/741,610
Spaced-rotor ride-type surface working machine with single-stick control of all movements
Inventors:
Orville H. Holz, Sr., Norbert J. Holz
Patented Case
View Patent ↗
Granted: Sep 6, 1977
Filed: Nov 15, 1976
Inventors
Orville H. Holz, Sr.
Norbert J. Holz
Assignee (at issue)
Orville H. Holz, Jr.
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.