发明名称 SOUND SYSTEMS FOR MODEL RAILROAD LOCOMOTIVES
摘要 On-board model railroad speaker enclosure designs are presented that allow maximum sized speakers, improve impedance matching of sound to the outside of the locomotive, and isolate back and front speaker waves while maintaining the standard horizontal drive-train in model train locomotives.
申请公布号 US2009016556(A1) 申请公布日期 2009.01.15
申请号 US20080176275 申请日期 2008.07.18
申请人 SEVERSON FREDERICK E 发明人 SEVERSON FREDERICK E.
分类号 H04R1/20;A47B81/06;G08B1/00;G10K1/00;H04R1/02 主分类号 H04R1/20
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