Granted Patent
Utility
US 4,677,740 · App. 06/838,409
Forming monolithic planar opto-isolators by selective implantation and proton bombardment
Inventors:
Gordon A. Shifrin, Robert G. Hunsperger
Patented Case
View Patent ↗
Granted: Jul 7, 1987
Filed: Mar 7, 1986
Inventors
Gordon A. Shifrin
Robert G. Hunsperger
Assignee (at issue)
Hughes Aircraft Company
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.