A kit for holding and displaying coins and paper money. Each sheet for holding coins has two overlying clear vinyl sheets and a third backing sheet. The front sheet has a slit used to insert or remove a coin and is formed in the cover sheet to retain a coin. Behind the clear cover sheet is a display...http://www.google.com.tw/patents/US6929127?utm_source=gb-gplus-share專利 US6929127 - H and D easy display
