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| Number | Title | Issue Date |
| 8031850 | Systems and methods for visitation terminal user identification Systems and methods which collect information regarding users of controlled environment visitation terminals for identification of one or more parties to a visitation conversation are shown. Identifying information may be provided by various means, such as entry of ... | 10/04/2011 |
| 7623641 | Audio communication unit A voice communication unit for communicating though a barrier includes an outer audio unit including an outer voice sensing device and an outer voice reproducing device, an inner audio unit including an inner voice sensing device and an inner voice reproducing devic... | 11/24/2009 |
| 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 to a communications system of the location. The device includes a si... | 08/01/2006 |
| 6760419 | Method and apparatus for interfacing a drive-thru intercom system with a telephone system A method and system for interconnecting a telephone system and an intercom system. In one exemplary embodiment, telephone switchgear is connected to a telephone interface which provides separate voice transmit and receive channels. For example, an E&M tie line modul... | 07/06/2004 |
| 6671360 | Intercom system for a building or apartment house An intercom system for a building or apartment house includes at least one main entrance station 1 which is installed at an entrance or the like of a building or an apartment house, a plurality of residential master stations 2 which are respectively insta... | 12/30/2003 |
| 5940486 | Two-way communication system with selective muting A bidirectional communication channel provides communication across a sound proof wall used, for example in a ticket booth. Normally communication from outside into the booth is muted by inhibiting the gain of a listen channel to a preselected percentage ... | 08/17/1999 |
| 4006310 | Noise-discriminating voice-switched two-way intercom system An intercom system for remote banking which facilitates communication between a teller terminal and a remotely located customer terminal. A two-way speaker is provided at the customer location and a separate microphone and a speaker are provided at the te... | 02/01/1977 |
