BJL: How about calling this technology "X3", which is the jargon adopted as an industry-standard by CIPA? "Foveon" is just one approach to X3, and not the one that Canon is pursuing, and the "X3" tag is also well-known.
Sony and now Canon appear to be pursuing this 'multiple' layered approach to sensor design. And every report that talks about it is always saying XXX is working on a Foveon-like sensor, etc. The thing I wonder is how patentable could it be if the concept for the sensor, despite whatever differences it might have is essentially the same 'in principle' as a Foveon. While I'm not sure whether Bayer arrays are any infringement from one designer to the other I would think anyone who attempts this approach would be breeching Foveon's patents similar to Polaroid success suits against Kodak when they came out with their own 'instant' process.