发明名称 Squirrel proof bird feeder
摘要 A bird feeder of cylindrical shape is hung by a loop on the top of a wire which runs through the center of the full length of the feeder. A beveled upper edge on the bottom closure, and spring perches, and no other protruding parts along the full length of the feeder prevent squirrels from securing a position on the feeder. There are no moving parts, and all parts are highly weather resistant.
申请公布号 US5678507(A) 申请公布日期 1997.10.21
申请号 US19960676933 申请日期 1996.07.08
申请人 KASSNER, WILLIAM H. 发明人 KASSNER, WILLIAM H.
分类号 A01K39/01;(IPC1-7):A01K39/01 主分类号 A01K39/01
代理机构 代理人
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