Granted Patent
Utility
US 5,319,504 · App. 07/843,522
Method and apparatus for marking a data block defective and re-recording data block in successive regions
Inventor:
Lionel C. Shih
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Feb 28, 1992
Inventor
Lionel C. Shih
Assignee (at issue)
Ampex Systems 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.