Granted Patent
Utility
US 4,954,935 · App. 07/308,166
Lighting system for illuminating billboards and the like
Inventors:
Douglas S. Hammond, Herbert Arnold Odle
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Feb 8, 1989
Inventors
Douglas S. Hammond
Herbert Arnold Odle
Assignee (at issue)
Holophane
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.