Granted Patent
Utility
US 6,557,444 · App. 10/090,384
Wood lathe with a stepless speed-adjusting unit for a workpiece
Inventor:
Juei-Seng Liao
Patented Case
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Granted: May 6, 2003
Filed: Mar 4, 2002
Inventor
Juei-Seng Liao
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.