Granted Patent
Utility
US 6,640,375 · App. 09/677,892
Brush assembly
Inventor:
Mauno Ruuska
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Oct 3, 2000
Inventor
Mauno Ruuska
Assignee (at issue)
Patria Vammas Oy
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.