Granted Patent
Utility
US 4,136,833 · App. 05/794,874
Renewable tip hammer for a crusher
Inventor:
Lloyd K. Knight
Patented Case
View Patent ↗
Granted: Jan 30, 1979
Filed: May 9, 1977
Inventor
Lloyd K. Knight
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.