Granted Patent
Utility
US 5,355,409 · App. 08/031,539
Scramble codec and a television receiver incorporating the same
Inventor:
Masayoshi Hirashima
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Mar 15, 1993
Inventor
Masayoshi Hirashima
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.