Granted Patent
Utility
US 5,308,151 · App. 07/980,251
Cutter wheel assembly for mining machine
Inventors:
David B. Sugden, John Turner
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Nov 23, 1992
Inventors
David B. Sugden
John Turner
Assignee (at issue)
Z C Mines PTY LTD
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.