Granted Patent
Utility
US 4,582,436 · App. 06/527,443
Live roller circle for large excavators
Inventor:
Thomas S. Merron
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Aug 29, 1983
Inventor
Thomas S. Merron
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.