Granted Patent
Utility
US 5,049,702 · App. 07/439,624
Afterset
Inventor:
Robert W. Hadfield
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Nov 21, 1989
Inventor
Robert W. Hadfield
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.