Granted Patent
Utility
US 4,764,823 · App. 06/940,896
Soft erase protection for video cassettes
Inventor:
Hans-Peter Baumeister
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Dec 12, 1986
Inventor
Hans-Peter Baumeister
Assignee (at issue)
EASTMAN KODAK COMPANY
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.