Granted Patent
Utility
US 4,694,145 · App. 06/701,907
Electronic controller for predetermined temperature coefficient heater
Inventors:
Douglas J. Romstadt, William R. Seitz
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: Feb 15, 1985
Inventors
Douglas J. Romstadt
William R. Seitz
Assignee (at issue)
ALLIED CONSULTING, 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.