Granted Patent
Utility
US 5,334,975 · App. 07/731,843
Residential time reference system
Inventors:
David E. Wachob, Hal M. Krisbergh
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Jul 16, 1991
Inventors
David E. Wachob
Hal M. Krisbergh
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.