Granted Patent
Utility
US 4,369,354 · App. 06/196,532
Arrangement for monitoring the operation of a heating element
Inventors:
Ludger Goedecke, Hans von Hayek
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Oct 14, 1980
Inventors
Ludger Goedecke
Hans von Hayek
Assignee (at issue)
Siemens Aktiengesellschaft
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.