Granted Patent
Utility
US 5,912,947 · App. 08/717,495
Public notification system and method
Inventors:
Al Langsenkamp, William D. Arnold, Scott Arnold
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Sep 20, 1996
Inventors
Al Langsenkamp
William D. Arnold
Scott Arnold
Assignee (at issue)
Sigma/Micro 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.