Granted Patent
Utility
US 5,447,434 · App. 08/194,851
Micromechanical seal
Inventor:
Leon Shaw
Patented Case
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Granted: Sep 5, 1995
Filed: Feb 14, 1994
Inventor
Leon Shaw
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.