Granted Patent
Utility
US 4,450,496 · App. 06/228,347
Protection of certain electrical systems by use of PTC device
Inventors:
Frank A. Doljack, Lee M. Middleman
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jan 26, 1981
Inventors
Frank A. Doljack
Lee M. Middleman
Assignee (at issue)
Raychem Limited
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.