Granted Patent
Utility
US 4,254,928 · App. 06/019,042
Stabilized elevator for stretcher or the like
Inventors:
David F. Huempfner, Douglas A. Rippe, Robert Martin
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Mar 9, 1979
Inventors
David F. Huempfner
Douglas A. Rippe
Robert Martin
Assignee (at issue)
American Hospital Supply Corp.
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.