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RE: Ligature Patents, Bonade

Author: Don Berger
Date: 1999-10-08 16:18

Ming - Do I understand that you plan to make a mold and cast the entire ligature [prob except for the threaded portions] from the "noble" metals, gold, silver, platinum and others? I should think that cutting the form from sheet-stock followed by welding [silver-soldering] would give it more tensile strength, but I know little of metalworking. Some time back I found a recent patent for a gold-colored strong alloy containing Indium, making it expensive, but likely cheaper than gold alloys. I will try to recall that pat # and get a copy of Bonade as well to help all I can. B's pat has of course expired, so you are prob safe to use his methods and materials, however if you develop techniques beyond its scope and attempt to manufacture and sell, you will need an infringement search and evaluation to be safe as there are many more-recent pats which may claim improvements on Bonade. Its complicated! Don

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