Granted Patent
Utility
US 6,313,565 · App. 09/504,567
Multiple frequency cleaning system
Inventor:
William L. Puskas
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Feb 15, 2000
Inventor
William L. Puskas
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.