Granted Patent
Utility
US 5,757,750 · App. 08/885,852
Optical disk having both constant linear and constant angular velocity recording regions and optical disk recording system
Inventor:
Yutaka Uemura
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Jun 30, 1997
Inventor
Yutaka Uemura
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.