Granted Patent
Utility
US 5,259,554 · App. 07/883,543
Temperature responsive, pilot operated line valve with shape memory alloy actuator
Inventors:
William A. Ewing, Richard L. Martin
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: May 15, 1992
Inventors
William A. Ewing
Richard L. Martin
Assignee (at issue)
MemRay 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.