Granted Patent
Utility
US 4,343,961 · App. 06/135,836
Temperature sensing device having a rotating reference member
Inventor:
W. Jack Norton
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Mar 31, 1980
Inventor
W. Jack Norton
Assignee (at issue)
PPG Industries, Inc.
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.