Granted Patent
Utility
US 4,667,307 · App. 06/551,009
Circuit for selecting and locking in operation function circuitry
Inventors:
Thomas C. Porcher, Morgan E. Robinson, David B. Hughes
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Nov 14, 1983
Inventors
Thomas C. Porcher
Morgan E. Robinson
David B. Hughes
Assignee (at issue)
Digital Equipment 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.