Alvin M. Marks, a prolific inventor who held patents on polarized film for sunglasses, a 3-D moviemaking process, a generator the size of a grapefruit that could produce enough electricity for a house, a windmill with no moving parts and a trillion-dollar "space train," died May 25 in Gardner, Massachusetts. He was 97.
For much of the latter half of his career, Marks focused on developing alternative and low-cost energy sources. An early experimenter with solar energy, he served as an adviser to President John F. Kennedy, and in 1967 was a consultant to the United States Senate on new technologies.
Full story from the New York Times.