Granted Patent
Utility
US 5,383,450 · App. 07/886,386
Liquid shield visor for a surgical mask
Inventors:
Vance M. Hubbard, Welton K. Brunson
Patented Case
View Patent ↗
Granted: Jan 24, 1995
Filed: May 19, 1992
Inventors
Vance M. Hubbard
Welton K. Brunson
Assignee (at issue)
TCNL Technologies, 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.