Granted Patent
Utility
US 5,060,508 · App. 07/503,216
Gas sample chamber
Inventor:
Jacob Y. Wong
Patented Case
View Patent ↗
Granted: Oct 29, 1991
Filed: Apr 2, 1990
Inventor
Jacob Y. Wong
Assignee (at issue)
Gaztech 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.