Granted Patent
Utility
US 5,923,628 · App. 08/921,085
Disk rotational velocity controlling circuit
Inventor:
Hiromichi Nogawa
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Aug 29, 1997
Inventor
Hiromichi Nogawa
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.