The tool for contemplation comprises a paper on which a main unit and a sub unit that surrounds the main unit are printed. The main unit includes a subject display cell that displays a subject and a plurality of thought results display cells that display a plurality of thought results found from the...http://www.google.com.tw/patents/US6830455?utm_source=gb-gplus-share專利 US6830455 - Instrument for contemplation
