Granted Patent
Utility
US 5,315,987 · App. 07/984,529
Filtering canister with deployable hood and mouthpiece
Inventor:
Linsey J. Swann
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: Dec 2, 1992
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.