Granted Patent
Utility
US 5,081,042 · App. 07/496,561
Ionic component sensor and method for making and using same
Inventors:
Masao Yafuso, Chong F. Yan
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Mar 20, 1990
Inventors
Masao Yafuso
Chong F. Yan
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.