Patents - 1985

Tandem coupled cavity lasers with separate current control and high parasitic resistance between them for bistability and negative resistance characteristics and use thereof for optical disc readout
Amnon Yariv, Christoph Harder and Kam-Yin Lau
U.S. Patent 4,562,569. December 1985

Interleavers for digital communications
Elwyn R. Berlekamp and Po Tong
U.S. Patent 4,559,625. December 1985

Nonvolatile memory cell
Samuel T. Wang, Chenming Hu and Ying Shum
U.S. Patent 4,538,246. August 1985

Silicon gigabit metal-oxide-semiconductor device processing
Ping K. Ko
U.S. Patent 4,532,697. August 1985

Simultaneous transmission of speech and data over an analog channel
Edward A. Lee and David G. Shaw
U.S. Patent 4,523,311. June 1985