Granted Patent
Utility
US 5,162,658 · App. 07/688,175
Thermal detection arrangement having a plurality of optical filter devices
Inventors:
Robert E. Turner, Richard A. Ford
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Apr 22, 1991
Inventors
Robert E. Turner
Richard A. Ford
Assignee (at issue)
Thorn EMI plc
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.