Granted Patent
Utility
US 4,820,376 · App. 07/116,988
Fabrication of CPI layers
Inventors:
William LAMBERT, Neng-Hsing Lu, Ray D. Rust
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Nov 5, 1987
Inventors
William LAMBERT
Neng-Hsing Lu
Ray D. Rust
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.