I have 35 years of experience, and specialize in the field of product liability with specific knowledge in the areas of machine guarding, warnings and human factors. I have published on such topics as meat grinders, garage door safety and aquatic safety. I have testified 99 times on topics such as machine safeguarding, warnings and human factors. As a plaintiff’s expert I’ve influenced the case law re. warnings and I’ve influenced legislation regarding residential garage door operators in Minnesota and California.