Patents by Inventor Alan Chiang

Alan Chiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multi-functional alarming system
    Patent number: 5291183
    Abstract: An alarm system employing a vocoder which enables the alarm system to emit not only a buzzing sound but also a human voice, the alarm system being composed of a microphone, a microphone amplifier, a vocoder, a memory, a preamplifier, a power amplifier and a speaker whereby the alarm system can emit the buzzing sound of a police car, whistle sound or human voice to enhance the burglarproof effect or serve as a fire alarm system for indicating the way to escape.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: March 1, 1994
    Assignee: Ultrafashion Textile Co., Ltd.
    Inventor: Alan Chiang