Donald Knoff Ling, the owner of Reliance Trailer Manufacturing Company, died August 3, 2011 from complications related to Parkinson's disease. He was 81. Born in San Jose CA, Ling graduated from San Jose State University and had a 50-year career in the heavy-duty truck trailer industry. He relocated Reliance Trailer from San Francisco to Cotati CA in 1974. Ling is survived by his wife Carol; children Brian (Debbi) Ling and Dana (Chris) Taddei; and grandchildren Jesse Farley, Brenton and David Ling, and Alyssa and Aidan Taddei. Memorial contributions may be made to the Rotary Foundation ( or Buck Institute (