Granted Patent
Utility
US 6,550,074 · App. 10/202,430
Air-burst drain plunger
Inventors:
Howard M. Allenbaugh, David M. Turchik, Gerard G. Adelmeyer
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Jul 23, 2002
Inventors
Howard M. Allenbaugh
David M. Turchik
Gerard G. Adelmeyer
Assignee (at issue)
M.A.G. Engineering & Mfg. Co.
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.