Granted Patent
Utility
US 4,223,335 · App. 06/018,985
Semiconductor device body having identical isolated composite resistor regions
Inventor:
Jeffrey D. Kane
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Mar 9, 1979
Inventor
Jeffrey D. Kane
Assignee (at issue)
Ferranti Limited
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.