Thanks to all who offered the Bluethner information...I now have a copy of the PTG article, and some other very interesting information. I would appreciate any further hints from firsthand experience with the Bluethner patent action. Stephen Birkett (Fortepianos) Authentic Reproductions of 18th and 19th Century Pianos Waterloo, Ontario, Canada tel: 519-885-2228 fax: 519-763-4686
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