Granted Patent
Utility
US 6,793,974 · App. 10/636,259
Selecting a material for use as the expansive element
Inventors:
Gregory John McAvoy, Kia Silverbrook
Patented Case
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Granted: Sep 21, 2004
Filed: Aug 8, 2003
Inventors
Gregory John McAvoy
Kia Silverbrook
Assignee (at issue)
Silverbrook Research Pty Ltd
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.