Granted Patent
Utility
US 5,864,458 · App. 08/564,465
Overcurrent protection circuits comprising combinations of PTC devices and switches
Inventors:
Hugh Duffy, Justin Chiang, John Midgley
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Nov 29, 1995
Inventors
Hugh Duffy
Justin Chiang
John Midgley
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.