Granted Patent
Utility
US 4,809,855 · App. 07/066,986
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Inventor:
Rafael T. Bustos
Patented Case
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Granted: Mar 7, 1989
Filed: Jun 24, 1987
Inventor
Rafael T. Bustos
Assignee (at issue)
Legett & Platt, Incorporated
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.