Granted Patent
Utility
US 4,581,664 · App. 06/534,437
Disk accessing circuitry
Inventors:
Frank J. Sordello, Andrew M. Rose
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Sep 21, 1983
Inventors
Frank J. Sordello
Andrew M. Rose
Assignee (at issue)
Memorex 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.