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专利名称：Multipurpose writing instrument发明人：Jason Ryan申请号：US12954815申请日：20101126公开号：US088397B2公开日：20141021
专利附图：
摘要：A disposable writing instrument is provided for carpenters, masons and othertradesmen. The instrument is a lead pencil which comprises one or more accessories,including a level and a ruler. The level is positioned about the center of the instrument.Either or both ends of the instrument are adapted to be used to mark a surface.
申请人：Jason Ryan
地址：Ottawa CA
国籍：CA
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