Granted Patent
Utility
US 4,161,742 · App. 05/876,137
Semiconductor devices with matched resistor portions
Inventor:
Jeffrey D. Kane
Patented Case
View Patent ↗
Granted: Jul 17, 1979
Filed: Feb 8, 1978
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.