Granted Patent
Utility
US 6,733,169 · App. 10/420,180
Poker vibrator with frequency transformer
Inventor:
Michael Steffen
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Apr 22, 2003
Inventor
Michael Steffen
Assignee (at issue)
Wacker Construction Equipment AG
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.