Granted Patent
Utility
US 4,616,408 · App. 06/687,507
Inversely processed resistance heater
Inventor:
William J. Lloyd
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Jan 4, 1985
Inventor
William J. Lloyd
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.