Granted Patent
Utility
US 5,035,236 · App. 07/540,266
Filtration device for respiratory gasses with heat and moisture exchange
Inventor:
Rahul G. Kanegaonkar
Patented Case
View Patent ↗
Granted: Jul 30, 1991
Filed: Jun 19, 1990
Inventor
Rahul G. Kanegaonkar
Assignee (at issue)
Smiths Industries Public Limited Company
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.