Granted Patent
Utility
US 5,684,785 · App. 08/551,577
Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system
Inventors:
Satoshi Itami, Kenichi Utsumi, Kazuo Nakashima, Kazunori Naito, Satoshi Komura
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Nov 1, 1995
Inventors
Satoshi Itami
Kenichi Utsumi
Kazuo Nakashima
Kazunori Naito
Satoshi Komura
Assignee (at issue)
Fujitsu Limited
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.