Granted Patent
Utility
US 4,650,696 · App. 06/782,691
Process using tungsten for multilevel metallization
Inventor:
Joseph S. Raby
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Oct 1, 1985
Inventor
Joseph S. Raby
Assignee (at issue)
HARRIS 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.