Granted Patent
Utility
US 4,456,016 · App. 06/394,403
Inhalation valve
Inventors:
Christopher Nowacki, Alfred Brisson
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Jul 1, 1982
Inventors
Christopher Nowacki
Alfred Brisson
Assignee (at issue)
Trutek Research, 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.