Seven years after filing and eighteen months after receiving notice of its allowance by the U.S. Patent Office, LeisureTech Electronics, announced that they have received U.S. patent no. 7,181,023 for their A-BUS technology...

Today’s lifestyle needs in-home communications with multi-level structures and distant front gates. Clear and easy-to-use intercom communications throughout the home are important even more so with secure control of entry through doors and gates...