The following is a guest contribution by David Greene, Esq. of Greene and Greene, Attorneys at Law. In the last year or so, I have been hearing a lot about a newish technology known as 3D printing. Before this past year, these printers were expensive, but lately have come down in price to the point of being attainable by amateur hobbyists. Now, you can by one of these printers for a thousand dollars or less, though you may be left to put together hundreds of small parts before your printer will work. If you don’t know, 3D printers are machines that create parts,...