Granted Patent
Utility
US 5,159,543 · App. 07/812,114
Interface circuit including DC/DC converter
Inventor:
Tatsushi Yamawaki
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Dec 20, 1991
Inventor
Tatsushi Yamawaki
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.