Granted Patent
Utility
US 6,783,443 · App. 10/244,040
Polishing machine for stone materials, having multiple grinding heads aligned on two oscillating and parallel beams with variable offset
Inventor:
Luigi Pedrini
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Sep 13, 2002
Inventor
Luigi Pedrini
Assignee (at issue)
Pedrini S.p.A.
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.