patentlyo.com资料：
2000年至2007年授权的design平均用了16.2个月
原文：Recently issued design patents (issued 2000–2007) were, on average, pending for 16.2 months. Companies with at least 100 design patents during that period had about one month less pendency than those with fewer patents.
design被公告后要缴纳 issue fee 820美元(small entity 410美元)，design不像utility专利那样要缴纳自公告后3.5年，7.5年及11.5年的专利维持费 |
