Granted Patent
Utility
US 6,522,513 · App. 09/431,253
Back-electromotive force protection circuit
Inventor:
Akihiro Akiba
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Nov 1, 1999
Inventor
Akihiro Akiba
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.