Patents by Inventor Henry Ma

Henry Ma 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).

  • Power adaptor
    Patent number: 9356380
    Abstract: The present invention provides a power adaptor with a retractable plug. The power adaptor contains a main member, a retractable plug, and power sockets. The plug contains an insulating plug body and three pins. The plug body has a rotary knob member on each of two opposing circumferential sides of the plug body. The main member has an indentation within which the plug is configured. The indentation has two opposing knob sockets on the side wall. The plug can be retracted and housed in the indentation, and the pins have their terminal sections away from connection plates of the main member. When the plug is pulled and erected from the main member, the pins have their terminal sections contacting the connection plates of the main member.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: May 31, 2016
    Assignee: STUFF ELECTRONICS (DONGGUAN) LIMITED
    Inventor: Ka Yeung Henry Ma
  • Method for assaying compounds or agents for ability to decrease the activity of microsomal prostaglandin E synthase or hematopoietic prostaglandin D synthase
    Publication number: 20040082021
    Abstract: Provided herein is a novel and useful method for evaluating the ability of compounds or agents to decrease the activity of microsomal prostaglandin E synthase or hematopoietic prostaglandin D synthase to produce their respective prostaglandin products.
    Type: Application
    Filed: August 15, 2003
    Publication date: April 29, 2004
    Applicant: Aventis Pharmaceuticals Inc.
    Inventors: Zhuyin Li, Junjie Xiong, Henry Ma, Jeffrey S. Sabol