2004-10-30/2019-10-23 - From the OHS PC Database, derived from A Guide to North American Organbuilders, rev. ed., by David H. Fox (Organ Historical Society, 1997). — In Palos Park, Illinois.; with Peterson Electro-Musical Products of Worth, Ilinois, 1982; active in 1989. Patents: Patent #4,127,756; November 28, 1978; stop tablet . Patent #4,157,051; June 5, 1979; stop tablet. Patent #4,303,000; December 1, 1981; swell shutters. Patent #4,319,513; May 16, 1982; tremolo. Patent #4,341,145; July 27, 1982; electronic pipe valve. Patent #4,361,069; November 30, 1982; electronic swell action. Source: Information taken from the text of the United States patents listed above.
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