Granted Patent
Utility
US 5,864,920 · App. 08/007,312
Door closer for the non-fire side of a fire-door safety installation
Inventors:
Rex H. Lasson, William L. Downey, Roderick A. L. Ross
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jan 15, 1998
Inventors
Rex H. Lasson
William L. Downey
Roderick A. L. Ross
Assignee (at issue)
Schlage Lock Company LLC
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.