Granted Patent
Utility
US 4,919,891 · App. 07/049,844
Sensor with overcoating and process for making same
Inventors:
Masao Yafuso, Henry K. Hui, Cheng F. Yan, William W. Miller
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: May 15, 1987
Inventors
Masao Yafuso
Henry K. Hui
Cheng F. Yan
William W. Miller
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.