Granted Patent
Utility
US 4,379,680 · App. 06/274,787
Ambient air timing device
Inventor:
William Barry
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Jun 18, 1981
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.