Granted Patent
Utility
US 4,459,043 · App. 06/315,596
Reflective elements and sensors including reflective elements
Inventor:
Douglas V. Luke
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Oct 30, 1981
Inventor
Douglas V. Luke
Assignee (at issue)
Smiths Industries Public Limited Company
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.