Granted Patent
Utility
US 4,967,041 · App. 07/318,699
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Inventor:
Timothy S. Bowman
Patented Case
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Granted: Oct 30, 1990
Filed: Mar 3, 1989
Inventor
Timothy S. Bowman
Assignee (at issue)
BUTLER MANUFACTURING COMPANY
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.