Granted Patent
Utility
US 6,517,081 · App. 10/054,711
Machinery seal
Inventors:
Gordon T. Zitting, Todd A. Hagen
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Jan 22, 2002
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.