Granted Patent
Utility
US 4,812,191 · App. 07/055,794
Method of forming a multilevel interconnection device
Inventors:
Chung W. Ho, B. Y. Min
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Jun 1, 1987
Inventors
Chung W. Ho
B. Y. Min
Assignee (at issue)
Digital Equipment 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.