The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
Apr. 12, 2002
Tsuyoshi Suzuki, Nagoya, JP;
Tsuyoshi Suzuki, Nagoya, JP;
Aiphone Co., Ltd., , JP;
Abstract
A television door intercom apparatus improves recognition performance for a resident inside a house to recognize a visitor conducting a call operation at the entrance and security in responding to the call. A call detection circuitof a residential master stationdetects a call when a visitor pushes a call buttonof a door intercom substation, activates a signal generator circuitand causes a master station speakerto output a call sound so that a communication can be exchanged between a substation microphoneand a substation speakerof the door intercom substation and a master station microphoneand the master station speaker of the residential master station. When a picture monitorof the residential master station displays a picture taken by a cameraof the door intercom substation, the residential master station further includes a message transmission circuitactivated when the call detection circuit detects the call, for causing the substation speaker to output a message content of a message storage circuitstoring in advance a predetermined message.