Granted Patent
Utility
US 6,340,161 · App. 09/504,451
Machinery seal
Inventors:
Gordon T. Zitting, Todd A. Hagen
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Feb 16, 2000
Inventors
Gordon T. Zitting
Todd A. Hagen
Assignee (at issue)
Macrotech Polyseal, Inc.
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.