William “Bill” Ralph Koreski, 84, of Lynnwood died Nov. 8 at home. Mr. Koreski was born in Yakima and served in the Navy during the Korean War. He also lived in Seattle, Rochester, Minn., and moved to Lynnwood in 1991. He owned Medical Monitor for 10 years. He was one of the first certified clinical engineers for development of heart, lung, organ perfusion and dialysis machinery. He developed the concept that is still used today.

Survivors include four children, Tanda Ferguson of Yakima, Nolan Koreski and Alida Skold, both of Issaquah, and Marla Downing of Fort Collins, Colo.; two sisters, Jetta Johnson of Bullhead, Ariz., and Mary Carder of Tucson, Ariz.; four grandchildren and a great-granddaughter.

At his request, there will be no services. He will be inurned in Tahoma Cemetery, Yakima. Arrangements are by Brookside Funeral Home and Crematory of Yakima.