In a message dated 4/30/2005 5:33:21 AM Pacific Standard Time, bwschug at charter.net writes: http://www.spectrum.ieee.org/WEBONLY/resource/may05/0505inve.html Bruce W. Schug bwschug at charter.net To bad an inventor has to pay or lose his rights when a copywrite lasts for ever, 75 years anyway and is free. rich