I can suggest two additional publications which may be of interest: 150 Years of Builders’ Hardware: Forms, Use & Lore © 1993 by Maud L. Eastwood. For sale by The Antique Doorknob Publishing Co., PO Box 2609, Woodinville, WA 98072-2609 Includes a brief Addendum entitled West Coast Inventions which includes a listing of U.S. Patents, inventors and dates. The Builders Hardware Industry, A United States History, 1830s to 1990s © 1996 by Walter H. McAninch. For sale by the Lock Museum of America. Has an emphasis on western manufacturers and suppliers as the author was employed for many years in the builders’ hardware industry in Seattle, Washington. Pete Schifferli Tonawanda, NY