Granted Patent
Utility
US 5,469,665 · App. 08/140,213
Threshold system
Inventor:
Lawrence F. Biebuyck
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Oct 21, 1993
Inventor
Lawrence F. Biebuyck
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.