Granted Patent
Utility
US 4,297,729 · App. 05/961,933
Encoding and decoding of digital recordings
Inventors:
James H. Steynor, Frederick A. Hayes
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Nov 20, 1978
Inventors
James H. Steynor
Frederick A. Hayes
Assignee (at issue)
EMI, LLC
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.