Granted Patent
Utility
US 6,173,964 · App. 09/111,322
Seal assembly with backup elements having coil springs positioned therein
Inventors:
Merle L. Bell, Ian Gravill
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Jul 7, 1998
Inventors
Merle L. Bell
Ian Gravill
Assignee (at issue)
Greene, Tweed of Delaware, 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.