Granted Patent
Utility
US 6,742,923 · App. 10/056,027
Seal shaft shutoff device and method
Inventors:
Robert Blakley, Bernd Gigas
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Jan 28, 2002
Inventors
Robert Blakley
Bernd Gigas
Assignee (at issue)
SPX 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.