Granted Patent
Utility
US 4,979,174 · App. 07/291,900
Error correction and detection apparatus and method
Inventors:
Ying Cheng, Subrahmanyam Dravida
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Dec 29, 1988
Inventors
Ying Cheng
Subrahmanyam Dravida
Assignee (at issue)
AT&T Bell Laboratories
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.