Granted Patent
Utility
US 4,981,633 · App. 07/188,306
Process for preparing a PTC thermistor
Inventors:
Aldo B. Alles, Vasantha R. W. Amarakoon, Vernon L. Burdick
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Apr 29, 1988
Inventors
Aldo B. Alles
Vasantha R. W. Amarakoon
Vernon L. Burdick
Assignee (at issue)
Alfred University
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.