Age 49, a carpenter, was using a 10-inch Black and Decker miter box saw when an unguarded blade on the right side struck his left hand, amputating one-third around the thumb. Thumb was sewn back on and palm repaired, but a year later index finger had to be removed and other fingers are unable to grasp, numb and have pain, due to tendon injury. Inventor had testified he designed guards for both sides but deft omitted right side because most users are right-handed.