Granted Patent
Utility
US 6,473,135 · App. 09/504,857
Signal input selector for television set and method of implementing same
Inventor:
Ryuichi Iwamura
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Feb 16, 2000
Inventor
Ryuichi Iwamura
Assignees (at issue)
SONY GROUP CORPORATION
SONY ELECTRONICS INC.
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.