Koff May 27, 2020 at age 94. Predeceased by his wife, Lois; parents, Philip & Sarah Koff; sisters, Miriam Bieling & Edith Yaffie, and Lucille Krantz. He is survived by his loving children, Susan (Guy) Nash and Jeffrey (Sandra) Koff; grandchildren, Sarah (Chris) Swenson, Phillip Koff and Sierra (Kyle Murray) Nash; great-grandchildren, Mason & Isla Swenson; special friend, Adelaide Harris; nieces & nephews. Irv was a WW II Veteran serving in the Navy, as well as a toolmaker, engineer, teacher & mentor. Graveside Services will be held privately in Mt. Hope Cemetery. Donations may be made to a charity of one’s choice in Irv’s honor.