Granted Patent
Utility
US 5,284,775 · App. 07/949,771
Gas sensing element and method for making same
Inventors:
Masao Yafuso, Mark Z. Holody, Thomas P. Maxwell, Thomas G. Hacker
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Sep 21, 1992
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.