Granted Patent
Utility
US 4,636,072 · App. 06/529,376
Method and apparatus for improved photometric testing of high intensity discharge lamps and luminaires
Inventor:
Theodor G. Yahraus
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Sep 6, 1983
Inventor
Theodor G. Yahraus
Assignee (at issue)
National Service Industries, Inc.
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.