Granted Patent
Utility
US 5,450,639 · App. 08/171,006
Electrically activated visual indicator for visually indicating the mode of a hospital bed castor
Inventors:
Matthew W. Weismiller, Kenneth L. Kramer
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Dec 21, 1993
Inventors
Matthew W. Weismiller
Kenneth L. Kramer
Assignee (at issue)
HILL-ROM, INC.
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.