Granted Patent
Utility
US 4,316,196 · App. 06/024,486
Illumination and light gate utilization methods and apparatus
Inventor:
John Jacobs
Patented Case
View Patent ↗
Granted: Feb 16, 1982
Filed: Mar 27, 1979
Inventor
John Jacobs
Assignee (at issue)
Bell and Howell, LLC
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.