Granted Patent
Utility
US 4,368,521 · App. 06/192,646
Method and apparatus for dragline tightline protection
Inventor:
John T. Sholes, II
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Sep 30, 1980
Inventor
John T. Sholes, II
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.