Granted Patent
Utility
US 4,935,209 · App. 06/909,158
Reaction enhancement through accoustics
Inventor:
Billy D. Pfoutz
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Sep 19, 1986
Inventor
Billy D. Pfoutz
Assignee (at issue)
Belco Technologies Corporation
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.