Granted Patent
Utility
US 4,519,722 · App. 06/414,846
Regulating wheelhead drive
Inventors:
William E. Shank, Kenneth K. Bercaw
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Sep 3, 1982
Inventors
William E. Shank
Kenneth K. Bercaw
Assignee (at issue)
Litton Industrial Products, 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.