Granted Patent
Utility
US 4,411,708 · App. 06/180,914
Method of making precision doped polysilicon vertical ballast resistors by multiple implantations
Inventor:
Lucien C. Winhan
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Aug 25, 1980
Inventor
Lucien C. Winhan
Assignee (at issue)
TRW 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.