Granted Patent
Utility
US 4,302,159 · App. 06/068,728
Ambient air timing device
Inventor:
William Barry
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Aug 22, 1979
Inventor
William Barry
Assignee (at issue)
VAPOR CORP.
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.