Age 73, of St. Paul Entrepreneur and Innovator Passed away Sunday, January 26, 2014. Survived by cherished wife of 51 years, Valerie; sons Matthew (Melissa) and Joshua (Dana); grandson Markus; brothers Douglas, Dean, and Dale; nephew John; niece Ronna (Patrick). Marshall will be remembered for his diverse business interests, profound intellect, and ability to engage people of all backgrounds. He was the founder of five companies and the inventor of record on more than 200 patents. Those who loved him will miss his consistent support, optimism, and encouragement. Funeral service Thursday, January 30 at 11am at St. Mark's Episcopal Cathedral (519 Oak Grove Street, Minneapolis, MN). Visitation one hour prior to service at church. Memorials preferred to Children's Home Society of Minnesota.