Granted Patent
Utility
US 5,788,561 · App. 08/879,572
Apparatus for grinding floor surfaces and/or cutting grooves in floors
Inventors:
Gordon E. Pearlman, Clayton R. Peterson
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Jun 20, 1997
Inventors
Gordon E. Pearlman
Clayton R. Peterson
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.