Granted Patent
Utility
US 5,459,336 · App. 08/286,908
Semiconductor photocoupler with changing capacitance
Inventor:
Tetsuro Kato
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Aug 8, 1994
Inventor
Tetsuro Kato
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.