Granted Patent
Utility
US 6,250,844 · App. 09/352,226
Concrete finishing trowel with improved rotor assembly drive system
Inventors:
Ronald R. Sartler, Peter J. Smith, Steven Grant
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Jul 13, 1999
Inventors
Ronald R. Sartler
Peter J. Smith
Steven Grant
Assignee (at issue)
Wacker Corporation
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.