2004-10-30/2019-11-23 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). — In Bloomfield, New Jersey [dates unknown]; in Philadelphia, Pennsylvania by 1905; active 1916. Patents awarded to Joseph Slawik: Patent #599,199; February 15, 1898; action. Patent #623,843; April 25, 1899; organ action. Patent #802,333; October 17, 1905; pneumatic coupler. Sources: The Diapason December 1916, 13. [Information taken from the text of the United States patents listed above.]
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