Granted Patent
Utility
US 6,467,201 · App. 09/891,553
Trench-cutting machine with cutting head lock mechanism
Inventors:
Chris McSharry, Herbert E. Jakob
Patented Case
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Granted: Oct 22, 2002
Filed: Jun 26, 2001
Inventors
Chris McSharry
Herbert E. Jakob
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.