Granted Patent
Utility
US 5,257,487 · App. 07/907,337
Floor box for in-floor activations in a concrete floor
Inventors:
Kermit Bantz, Timothy S. Bowman, Robert W. Hadfield
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: Jul 1, 1992
Inventors
Kermit Bantz
Timothy S. Bowman
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.