On 8/14/06, Vasile Surducan wrote: > > Cebashev (eliptical) filters are also patented but I didn't heard I > must ask someone's agree to use them in a project... > The difference is whether the patent protection expired or not... Certain part of the world tend to not forget the IP things and big companies may choost not to invest there because of IP issues. Interestingly I am going to have a training on IP issues 20 minutes later. Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist