Granted Patent
Utility
US 4,682,402 · App. 06/610,827
Semiconductor device comprising polycrystalline silicon resistor element
Inventor:
Yasutaka Yamaguchi
Patented Case
View Patent ↗
Granted: Jul 28, 1987
Filed: May 15, 1984
Inventor
Yasutaka Yamaguchi
Assignee (at issue)
NEC 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.