Granted Patent
Utility
US 6,231,432 · App. 09/439,118
Floor treatment machine with torque limiter
Inventors:
Clay Peterson, Michael A. Jackola
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Nov 12, 1999
Inventors
Clay Peterson
Michael A. Jackola
Assignee (at issue)
Pearl Abrasive Company
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.