Granted Patent
Utility
US 4,543,646 · App. 06/156,594
Chip topography for MOS Data Encryption Standard circuit
Inventors:
William H. Ambrosius, III, Larry D. Rossean
Patented Case
View Patent ↗
Granted: Sep 24, 1985
Filed: Jun 5, 1980
Inventors
William H. Ambrosius, III
Larry D. Rossean
Assignee (at issue)
Western Digital
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.