Granted Patent
Utility
US 4,814,587 · App. 06/872,694
High power self-regulating heater
Inventor:
Philip Scot Carter
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Jun 10, 1986
Inventor
Philip Scot Carter
Assignee (at issue)
Metcal, Inc.
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.