Granted Patent
Utility
US 6,453,902 · App. 09/706,632
Smoke escape mask
Inventors:
David Hollander, Karen Hollander
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Nov 6, 2000
Inventors
David Hollander
Karen Hollander
Assignee (at issue)
Fire Drill, 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.