Granted Patent
Utility
US 5,227,864 · App. 07/715,379
System for leveling workpieces
Inventor:
Michael Alan Yowler
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jun 14, 1991
Inventor
Michael Alan Yowler
Assignee (at issue)
Spectra-Physics Laserplane, 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.