美国专利号us6,,811,564 b1

Multi-plane compound folding frame

A folding frame comprises four vertical legs and at least one shelf pivotally connected to each of the four vertical legs, each shelf being capable of folding vertically upward. The folding frame further comprises two support beams positioned beneath and on opposite ends of each shelf, each support beam being pivotally connected to two of the four vertical legs and capable of folding horizontally inward. The folding frame is moveable between an extended position with each shelf being horizontal and supported by two of the support beams, and a collapsed position with each shelf being folded vertically upward and the support beams being folded horizontally inward.

其同族专利有：

AU2004247054、CA2519099、EP1635676、JP2007500578、MXPA05012809、USRE41763 、WO2004110221

从其PCT专利的法律状态可以看出，有指定以下国家：AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW ……

但是，在欧盟专利局未检索到中国申请的同族，当然不知道楼主要问什么，所以也就同有进一步检索。

附件为美国专利原文。