Granted Patent
Utility
US 4,329,726 · App. 06/098,712
Circuit protection devices comprising PTC elements
Inventors:
Lee M. Middleman, Joseph H. Evans, Donald F. Pettengill
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Nov 30, 1979
Inventors
Lee M. Middleman
Joseph H. Evans
Donald F. Pettengill
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.