Granted Patent
Utility
US 5,316,355 · App. 08/061,219
Integral door knob assembly with spring return
Inventors:
Rae Hartwell, Ian Garben
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: May 13, 1993
Inventors
Rae Hartwell
Ian Garben
Assignee (at issue)
Masco Corporation of Indiana
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.