-
公开(公告)号：US07023327B1
公开(公告)日：2006-04-04
申请号：US10623820
申请日：2003-07-21
Applicant: Ching Cheng Chen
Inventor： Ching Cheng Chen
IPC: G10K1/06
CPC classification number: G08B3/10
Abstract: A remote chime unit and signal extender assembly are connectable to the circuitry of a primary doorbell system allowing the remote chime to be activated simultaneously with the primary doorbell chime from a stored voltage source.
Abstract translation: 远程钟声单元和信号延长器组件可连接到主门铃系统的电路，允许远程钟声与来自存储的电压源的主门铃音同时被激活。
Search Results
1
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
