Granted Patent
Utility
US 5,335,534 · App. 07/894,919
Functional testing method for toxic gas sensors
Inventor:
Jacob Y. Wong
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jun 8, 1992
Inventor
Jacob Y. Wong
Assignee (at issue)
Gaztech International 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.