Granted Patent
Utility
US 5,335,656 · App. 07/964,070
Method and apparatus for inhalation of treating gas and sampling of exhaled gas for quantitative analysis
Inventors:
Edwin A. Bowe, E. F. Klein, Jr., Philip G. Boysen
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Oct 21, 1992
Inventors
Edwin A. Bowe
E. F. Klein, Jr.
Philip G. Boysen
Assignee (at issue)
Salter Laboratories
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.