Granted Patent
Utility
US 4,517,542 · App. 06/435,073
Voltage and temperature compensated time delay relay
Inventor:
Hemming G. Siiberg
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Oct 18, 1982
Inventor
Hemming G. Siiberg
Assignee (at issue)
Edison International 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.