- 专利标题: Display device for illustrating scientific codes, and corresponding hexagrams
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申请号: US134907申请日: 1987-12-18
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公开(公告)号: USD313625S公开(公告)日: 1991-01-08
- 设计人: Johnson F. Yan , Suzie C. Yan
- 申请人: Johnson F. Yan , Suzie C. Yan
公开/授权文献
- US5420344A Process for producing highly pure terephthalic acid 公开/授权日:1995-05-30