Granted Patent
Utility
US 6,456,572 · App. 09/407,851
Disk driving unit
Inventor:
Kazuo Sakamoto
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Sep 29, 1999
Inventor
Kazuo Sakamoto
Assignee (at issue)
Nippon Columbia Co., Ltd.
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.