Granted Patent
Utility
US 6,128,271 · App. 09/175,536
Optical recording medium
Inventor:
Minemasa Ohta
Patented Case
View Patent ↗
Granted: Oct 3, 2000
Filed: Oct 20, 1998
Inventor
Minemasa Ohta
Assignees (at issue)
Pioneer Electronic Corporation
Pioneer Video 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.