Granted Patent
Utility
US 5,732,168 · App. 08/551,236
Thermal optical switches for light
Inventor:
David K. Donald
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Oct 31, 1995
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.