![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number CN201480052679.7A Other languages Chinese ( zh) Google Patents Doorbell communication systems and methodsÄownload PDF Info Publication number CN105612564A CN105612564A CN201480052679.7A CN201480052679A CN105612564A CN 105612564 A CN105612564 A CN 105612564A CN 201480052679 A CN201480052679 A CN 201480052679A CN 105612564 A CN105612564 A CN 105612564A Authority CN China Prior art keywords doorbell visitor security computing equipment user Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents CN105612564A - Doorbell communication systems and methods CN105612564A - Doorbell communication systems and methods ![]()
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