Granted Patent
Utility
US 5,812,939 · App. 08/686,864
Switch semiconductor integrated circuit and communication terminal device
Inventor:
Kazumasa Kohama
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Aug 1, 1996
Inventor
Kazumasa Kohama
Assignee (at issue)
SONY GROUP 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.