Granted Patent
Utility
US 4,993,142 · App. 07/368,281
Method of making a thermistor
Inventors:
Francis Michael Burke, William L. Buchanan
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Jun 19, 1989
Inventors
Francis Michael Burke
William L. Buchanan
Assignee (at issue)
Dale Electronics, 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.