Granted Patent
Utility
US 4,228,806 · App. 05/909,580
Sleep state inhibited wake-up alarm
Inventor:
Derek Lidow
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: May 25, 1978
Inventor
Derek Lidow
Assignee (at issue)
International Rectifier Corporation
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.