Granted Patent
Utility
US 3,949,425 · App. 05/465,030
Video systems
Inventors:
Ludwig A. Perret, Thomas C. Soran
Patented Case
View Patent ↗
Granted: Apr 6, 1976
Filed: Apr 29, 1974
Inventors
Ludwig A. Perret
Thomas C. Soran
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.