Granted Patent
Utility
US 5,054,480 · App. 07/537,700
Personal air filtration and control system
Inventors:
Rex O. Bare, David Millar, Harry Nicholas Herbert
Patented Case
View Patent ↗
Granted: Oct 8, 1991
Filed: Jun 14, 1990
Inventors
Rex O. Bare
David Millar
Harry Nicholas Herbert
Assignee (at issue)
Bio-Medical Devices, 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.