I just have a quick comment, and it is primarily directed towards U.S. patent law, not necessarily issues of the patent's validity or my opinion of the patent itself. The United States Patent and Trademark Office evaluates applications based on laws that are passed by Congress; the USPTO uses these laws to establish guidelines that must be followed before a patent can be issued. While it is true that the USPTO has a patent application examination process, it is very important to understand what is done during this part of the application process: the respective examining technology center that is assigned to an application searches through U.S. patents, publications of patent applications, foreign patent documents, and available literature. Based on the [limited amount of] research that is done, a patent is issued as long as what is claimed is 'new, useful, and nonobvious.' This is the important part: the validity of a patent issued is only tested if the patentee brings a suit against a defendant for infringement of patents (district court). The rules here are different than in the patent application process, but the most important difference is that this time the defendant will be doing the research to 'prove' to the courts that the clams that were made were not 'new, useful, and nonobvious.' When a patent is issued, it gives the patentee "the right to exclude others from making, using, offering for sale, or selling" the invention in the United States or "importing" the invention into the United States. It does NOT "prohibit by law" the making, using, offering for sale, or selling the invention. The "right to exclude" means that the patentee has the right to go to the courts to ask them to force others from making, using, offering for sale, or selling the invention. This is a VERY important distinction! For those technicians that walk the possible fine line of infringement of patents, be sure to read and understand the patent that was issued (5,585,582). If you feel strongly that the claims that were made were not 'new, useful, and nonobvious,' gather your evidence and continue to use what is in your opinion not 'excludable' material. Even is everything in the patent is completely valid, you would not be breaking any laws, you would simply be infringing on someone else rights; either way, it is still up to the patentee to spend the time and money to enforce those rights. >From a legal standpoint, I think that David would have a hard time getting the courts to enforce the patent that was issued if someone were merely using the basic concept; much of the patent's concept is based on older well-known material, and, at least among piano technicians, much of the material is not 'nonobvious.' On the other hand, the 43 claims are VERY well written . . . Bradley M. Snook
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