Which rights? The name? The design? The PC board layouts? The documentation? I would think the only things left to worry about are the name and any copyrights that might exist on the PC artwork. I doubt the actual design is protected at all - it's almost exactly what you'd get if you just took one of the Intel 8080A databooks and copied the CPU implementation. Why would anybody want to make an exact clone of the original design anyway? A couple months after the introduction of the Altair there were hundreds of garage-based businesses selling much better designed S-100 CPU's and peripherals! ----- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 2081