Laurence Beach posted: >...(did S&S invent the duplex scale?)... Once again, using the publication " The Steinways and Their Pianos in the Nineteenth Century" by Cynthia Adams Hoover: "...the duplex scale patented in 1872..." I don't know if patent means invent, but it certainly claims an exclusive right or title of the idea. Keith A. McGavern, RPT Oklahoma Chapter 731 Oklahoma Baptist University Shawnee, Oklahoma
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