I'm not sure if you have seen this but Pentax got a patent for a control system for an ultrasonic motor last year. US patent US6894422: http://v3.espacenet.com/origdoc?DB=EPODOC&IDX=US2002089257&F=0&RPN=US6894422&DOC=dcb65d04ab6827e7a25d16cf9851f8c86f
US6301441, from the same inventor, is also interesting and has been cited against a later patent from Canon... DagT (just doing some miscellaneous patent searches today...) -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
