Patents by Inventor Thanh D. Cao

Thanh D. Cao 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).

  • Patent number: 6420794
    Abstract: A hydropower conversion system for circulation of water between a delivering reservoir (101 or 201) and a receiving reservoir (102 or 202) through hydro-turbines (112 or 212), pumps (122 or 222), and back-up reservoir (104 or 204). Water in the delivering reservoir is maintained at a constant functioning level by adjusting valve (AV) linked with valve control mechanism (VCM) to adjust the opening and closing of passages (105 or 205) conducting water flowing from the back-up reservoir into the delivering reservoir. Outlets (106 or 206) allow excess water to flow out of the back-up reservoir back down to the receiving reservoir. The hydro-turbines are connected to power machinery (141 or 241). The pumps are driven by a natural energy source (151 or 251). In one embodiment, the receiving and delivering reservoirs are structurally connected; in another embodiment, the two reservoirs are separate reservoirs.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: July 16, 2002
    Inventor: Thanh D. Cao
  • Publication number: 20010047186
    Abstract: An acupressure point treatment apparatus including an acupressure pointer including a pellet on a finger strap, a finger grounder including a grounding plate on a finger strap, and a Galvanic Skin Response (GSR) monitor electrically connected to the acupressure pointer and the finger grounder.
    Type: Application
    Filed: June 15, 2001
    Publication date: November 29, 2001
    Inventor: Thanh D. Cao
  • Patent number: 6299586
    Abstract: An acupressure point treatment apparatus including an acupressure pointer including a pellet on a finger strap, a finger grounder including a grounding plate on a finger strap, and a Galvanic Skin Response (GSR) monitor electrically connected to the acupressure pointer and the finger grounder.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: October 9, 2001
    Inventor: Thanh D. Cao
  • Patent number: 6062159
    Abstract: The aquatic vehicle includes centers of mass (COM), of propulsion (COP) and of resistance (COR); a propulsion force (P) provided by propulsion sources (43, 44 or 143, 144); a neutralization of the propulsion and resistance torques; double blade control surfaces (20, 22, 24, 26 or 120, 122, 124, 126), each having two blades mounted on the opposite sides of a rotational axis; the surfaces being arranged such that the control effects are transmitted through COM; lateral boards (28, 30, 32, 34 or 128, 130, 132, 134) to provide the vehicle a lift in motion and structures of displacement volume (70, 72) to support the vehicle at rest. In one embodiment, the vehicle includes top and bottom components (12, 14) of equal normal cross-sectional areas (w1, w2). In another embodiment, the vehicle includes top and bottom components (112, 114) and top and bottom extensors (116, 118).
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: May 16, 2000
    Inventor: Thanh D. Cao