Granted Patent
Utility
US 5,186,165 · App. 07/710,812
Filtering canister with deployable hood and mouthpiece
Inventor:
Linsey J. Swann
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jun 5, 1991
Inventor
Linsey J. Swann
Assignee (at issue)
Brookdale International Systems, 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.