1967-1990 Patents, Marketing & Investment Correspondence of Inventions by Nelson J. Waterbury Including a Vitamin A Cigarette Filter and a Combination Incandescent and Solar-Electric Light Bulb with Automatic Switching Device and Charging Means Therefor
New York: No Publisher, 1967. F. Including: 1967 letter from Nicholas Ridgley du Pont regarding Hauni Inc.'s (of Germany) ability to adapt existing cigarette machines to the Vitamin A cigarette technology proposed by Nelson Waterbury, with a copy of the patent design drawing and information from the U.S. Patent Office.....