Granted Patent
Utility
US 6,374,427 · App. 08/677,707
Drain plunger
Inventor:
George Tash
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Jul 10, 1996
Inventor
George Tash
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.