发明名称 TRAFFIC MARKER HAVING GRAVITY SWITCH CONTROLLED HORN
摘要 A conical type rubber traffic marker is converted into a bidirectional warning sound amplifier by installation of a horn or horns. A gravity switch is actuatable, in the event of overturn, with the cone of traffic marker serving as a megaphone.
申请公布号 US3660817(A) 申请公布日期 1972.05.02
申请号 USD3660817 申请日期 1970.12.22
申请人 HARVEY E. ABRAMS 发明人 HARVEY E. ABRAMS
分类号 E01F9/012;G08B3/00;G10K9/18;(IPC1-7):G08B5/36;G08B5/38 主分类号 E01F9/012
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