Granted Patent
Utility
US 4,285,576 · App. 06/036,489
Light gating methods and apparatus
Inventors:
Thomas H. Garland, Michael T. Zimmerman, Jr.
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: May 7, 1979
Inventors
Thomas H. Garland
Michael T. Zimmerman, Jr.
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.