Granted Patent
Utility
US 5,657,747 · App. 08/635,851
Interface for vaporizer interlock
Inventor:
Carl Holliday
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Apr 22, 1996
Inventor
Carl Holliday
Assignee (at issue)
NAD AG
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.