发明名称 IMPROVEMENTS RELATING TO TRAYS
摘要 <p>A tray is provided for use on a user's lap, the tray having a substantially flat working surface and provided with grip means on its underside, the grip means comprising one or more downwardly projecting members which can be gripped by the knees of the user to hold the tray steady on the user's lap.</p>
申请公布号 WO1991001105(A1) 申请公布日期 1991.02.07
申请号 GB1990001142 申请日期 1990.07.24
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