Granted Patent
Utility
US 4,428,069 · App. 06/333,055
Apparatus for preformatting an optical disk
Inventors:
Robert L. Hazel, John E. Kammerud
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Dec 21, 1981
Inventors
Robert L. Hazel
John E. Kammerud
Assignee (at issue)
Burroughs, Inc.
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.