Granted Patent
Utility
US 4,504,872 · App. 06/465,042
Digital maximum likelihood detector for class IV partial response
Inventor:
David A. Petersen
Patented Case
View Patent ↗
Granted: Mar 12, 1985
Filed: Feb 8, 1983
Inventor
David A. Petersen
Assignee (at issue)
Ampex 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.