发明名称 Single hung window with removable fixed lite
摘要 A two lite single hung window with a top fixed lite having a structure permitting affixation within the window frame involving only two screws, providing a window frame opening free of any middle rail when both lites are removed from the frame.
申请公布号 US4027431(A) 申请公布日期 1977.06.07
申请号 US19750630739 申请日期 1975.11.10
申请人 NATIONAL GYPSUM COMPANY 发明人 RACKARD, TROY D.
分类号 E06B3/44;(IPC1-7):E05D15/16 主分类号 E06B3/44
代理机构 代理人
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