Granted Patent
Utility
US 6,238,762 · App. 09/389,569
Selectively tearable covering sheet
Inventors:
Robert J. Friedland, Mark A. Calkins
Patented Case
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Granted: May 29, 2001
Filed: Sep 3, 1999
Inventors
Robert J. Friedland
Mark A. Calkins
Assignee (at issue)
Kittrich Corp.sup.n
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.