Granted Patent
Utility
US 5,978,527 · App. 09/128,555
Thermal optical switches for light
Inventor:
David K. Donald
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Aug 3, 1998
Inventor
David K. Donald
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.