Granted Patent
Utility
US 5,335,021 · App. 07/801,811
Logical comb filter and chroma signal separation circuit
Inventor:
Akira Sawada
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Dec 2, 1991
Inventor
Akira Sawada
Assignee (at issue)
NEC CORPORATION
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.