Granted Patent
Utility
US 5,558,342 · App. 08/286,665
Mechanical seal with spring drive
Inventor:
Josef Sedy
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Aug 5, 1994
Inventor
Josef Sedy
Assignee (at issue)
Durametallic 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.