Granted Patent
Utility
US 6,012,285 · App. 09/044,666
Exhaust pipe with improved drain
Inventors:
Todd J. Lutz, David N. Hoffman
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Mar 19, 1998
Inventors
Todd J. Lutz
David N. Hoffman
Assignee (at issue)
Wacker Corporation
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.