Granted Patent
Utility
US 6,622,311 · App. 10/188,656
Air filtration system including a helmet assembly
Inventors:
Luis Diaz, Bruce D. Henniges, Mark Wasserman, Karen L. Smit
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Jul 2, 2002
Inventors
Luis Diaz
Bruce D. Henniges
Mark Wasserman
Karen L. Smit
Assignee (at issue)
STRYKER INSTRUMENTS
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.