Granted Patent
Utility
US 5,912,454 · App. 08/886,054
System and method for detecting a relative change in light intensity
Inventors:
Leonardo Del Castillo, Margaret E. Winsor
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Jun 30, 1997
Inventors
Leonardo Del Castillo
Margaret E. Winsor
Assignee (at issue)
Microsoft 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.