Patents by Inventor Takayoshi Honma

Takayoshi Honma 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).

  • Semiconductor light emitting device and plant cultivating system
    Patent number: 7466023
    Abstract: Guard electrodes 2 which are electrically connected with a conductive portion of a cooling water passage 23 through connection lines 3 are respectively provided in the middle of a water inlet pipe 1 connected with a water inlet master pipe 10 and a water outlet pipe 6 connected with a water outlet master pipe 13 in M pieces of semiconductor laser units 4. At this time, since the guard electrode 2 has a potential equal to the conductive portion of the cooling water passage 23, the electric current hardly flows between the guard electrode 2 and the conductive portion of the cooling water passage 23. As a result, rusting is inhibited in the M pieces of semiconductor laser units 4, and a clogged piping is prevented in the cooling water passage 23.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: December 16, 2008
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Takayoshi Honma, Hiroshi Tsuchiya, Hirofumi Kan
  • Semiconductor light emitting device and plant cultivating system
    Publication number: 20050151140
    Abstract: Guard electrodes 2 which are electrically connected with a conductive portion of a cooling water passage 23 through connection lines 3 are respectively provided in the middle of a water inlet pipe 1 connected with a water inlet master pipe 10 and a water outlet pipe 6 connected with a water outlet master pipe 13 in M pieces of semiconductor laser units 4. At this time, since the guard electrode 2 has a potential equal to the conductive portion of the cooling water passage 23, the electric current hardly flows between the guard electrode 2 and the conductive portion of the cooling water passage 23. As a result, rusting is inhibited in the M pieces of semiconductor laser units 4, and a clogged piping is prevented in the cooling water passage 23.
    Type: Application
    Filed: March 6, 2003
    Publication date: July 14, 2005
    Inventors: Takayoshi Honma, Hiroshi Tsuchiya, Hirofumi Kan