Granted Patent
Utility
US 5,175,016 · App. 07/496,560
Method for making gas sensing element
Inventors:
Masao Yafuso, Mark Z. Holody, Thomas P. Maxwell, Thomas G. Hacker
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Mar 20, 1990
Inventors
Masao Yafuso
Mark Z. Holody
Thomas P. Maxwell
Thomas G. Hacker
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.