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7263182 |
Intelligent access control system
In operational environments where local loop generation equipment is used, communication interruptions between a central office and a customer premises device is minimized by using a dedicated...
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7135959 |
Apparatus and method for wireless doorbell and security control panel interaction
An apparatus and method for wireless doorbell and security control panel interaction is provided. The system includes a wireless doorbell, a security control panel, and at least one control panel...
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7109860 |
Surveillance apparatus integrated with mobile phone
The present invention is to provide a surveillance apparatus for monitoring the situation of a visitor through a mobile phone, which comprises a monitor assembly including a microprocessor, a...
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7085361 |
Methods and systems for communication from an exterior of a location
Methods and systems for allowing communication between an exterior and an interior of a location, or a person associated with the location. A device positioned exterior to the location is connected...
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6631179 |
Voice and motion activated telephone
A method and system for communicating without use of manual contact with a communications unit. The user approaches a communications system and can activate a communications unit by a...
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6438221 |
Electronote wall mounted messaging device
A wall-hung or shelf situated free-standing voice memorandum system allows an individual to record a message for another member of the household. the system can be used in connection with a...
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6233328 |
Door intercom
An automatic door answering system comprises a door intercom system, a recording machine, a telecommunication system, first, second and third interfaces, and a microprocessor-based switching...
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5966432 |
Remote answering of doorbell
An apparatus and method for remotely answering a door. The apparatus includes a switch, a telephone transmitter and an a telephone receiver positioned near the door. At least one telephone station...
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5905787 |
Method and apparatus for installing telephone intercom--voice messaging apparatus at doorbell for dwelling
A doorbell response system is utilized in a dwelling. The dwelling includes a telephone, includes a telephone line connected to the telephone, and includes a doorbell and a pair of doorbell...
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5657380 |
Interactive door answering and messaging device with speech synthesis
An automatic door answering and message system is disclosed. A preferred embodiment of the system has an interior unit and an exterior unit that communicate via an RF link. The system uses voice...
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5566233 |
Communication controlling apparatus for a single-line telephone with extensions thereto
In a single-line telephone, there are a plurality of extension telephone sets connected by a telephone line and each extension telephone set is connected to a communication controlling apparatus....
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5454032 |
Method of establishing communication link to one of multiple devices associated with single telephone number
A method of establishing a telephone communication link from a calling line to one of plural peripheral devices associated with a single telephone number in a central office telephone switching...
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5384838 |
System for communicating through partitions
An intercommunication system for transmitting signals through a door, and having piezo transducer devices mountable on each side of the door, a matrix of analog switches connecting the piezo...
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5315639 |
Hands-free intercom system
A "wireless" door answering intercom system (meaning no special wiring between the inside and outside stations) that allows a visitor to carry on a two-way conversation with a person inside the...
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4961177 |
Method and apparatus for inputting a voice through a microphone
An apparatus and method for inputting a voice through a microphone mounted at a position facing a speaking person. An image of a speaking person is generated and used to detect the position of a...
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4894858 |
Portable through-door intercom
A through-door security intercom that clamps on the free edge of a door of any conventional thickness. Clamping is effected by constant-force flat springs, which springs also provide current paths....
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4809320 |
Door security system
A security intercommunication system is disclosed which includes an inside housing, an outside housing and a peep-hole optical assembly including a cylindrical body having first and second...
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4715060 |
Door message apparatus with telephone answering device
A door message apparatus has a control unit which responds to operation of a doorbell switch to connect a door speaker/microphone to an automatic telephone answering and recording machine. The...
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4631365 |
Intercom system
The invention is directed to an intercom system for communication between persons on opposite sides of an entry door or the like. On a first embodiment the intercom device is energized by the...
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D283130 |
Combined door viewer and two-way intercom unit
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4558321 |
Visitor conversation system
A novel visitor conversation system comprising a single transmitter-receiver. The distance to an incoming person is measured by receiving an ultrasonic wave signal propagated from the...
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4554411 |
Intercom system
A communication system includes a master control with optional inside, door or patio remote units, door chime, phone coupler, or programming such as radio, phonograph, tape player or the like. The...
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4518826 |
Vandal-proof communication system
A touch switch and monitor lamp associated with an intercom station are embedded in a protective wall mounted plate with exposed ends flush with the planar surface of the plate which has openings...
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4273956 |
Audioscope project
The optical viewing device described comprises, in combination, an optical viewing tube for securing through the thickness of the door, an "outside" unit for attachment to the outside of the door...
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4130728 |
Combined mounting for through-the-wall viewer and intercom
Seeing and talking through a wall or closed door is conveniently provided by the combination of a one-way observation telescope projecting through the door and a pair of intercom units, one on each...
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3806662 |
BUILDING ENTRANCE CONTROL SYSTEM WITH KEY-PAD CONTROL
An arrangement for selecting a desired one of a number of operable devices - such as the line relays of a door-intercom system for apartment or the like buildings -- by means of a keypad. The...
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3491353 |
ELECTRICAL LOCKING DEVICE COMBINED WITH AN INTERPHONE SYSTEM
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3178648 |
Transistorized amplifier utilizing an input transformer bootstrap configuration
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