Patents Assigned to Yoshizaki-Gijutsukenkyusho
  • Device and method for preserving putting green on a golf course
    Patent number: 5306317
    Abstract: By circulating fluid heated by a boiler through a radiation pipe laid under the putting green of a golf course, the putting green is continuously, and warmed. In accordance with the difference between the temperatures on the outlet side and inlet side of the boiler, the temperature to which the fluid is heated is controlled, thereby maintaining an putting green at the optimum temperature for raising the lawn grass planted on the putting green.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: April 26, 1994
    Assignees: Ryokuei-Kensetsu Co., Ltd., Yoshizaki-Gijutsukenkyusho
    Inventor: Mitsuo Yoshizaki