Granted Patent
Utility
US 5,631,890 · App. 08/532,092
Light modulation method for optical disk drive device
Inventors:
Toru Ikeda, Shigenori Yanagi, Akira Minami
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Sep 22, 1995
Inventors
Toru Ikeda
Shigenori Yanagi
Akira Minami
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.