Granted Patent
Utility
US 5,016,527 · App. 07/508,002
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Inventors:
William S. Spamer, J. David Robertson, David C. F. Stoddard, James L. Hanna
Patented Case
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Granted: May 21, 1991
Filed: Apr 10, 1990
Inventors
William S. Spamer
J. David Robertson
David C. F. Stoddard
James L. Hanna
Assignee (at issue)
The Mead 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.