Patents by Inventor Yukihiro Nakata

Yukihiro Nakata 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).

  • Portable air-borne bacteria sampler
    Patent number: 6692953
    Abstract: Nozzle openings 15a each including a straight duct portion 15s and a tapered portion 15t are situated at an upstream position of an air flow with respect to the straight duct portion. The nozzle openings are formed in a nozzle plate 15 such that the nozzle openings 15a are arranged in grid, and airborne microorganisms passing through the nozzle plate 15 can be effectively collected to form colonies. A degree of cleanness is measured by counting the colonies visually.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: February 17, 2004
    Assignee: Midori Anzen Co., Ltd.
    Inventors: Naoki Sugita, Yutaka Hatta, Takeshi Yamada, Yukihiro Nakata
  • Portable air-borne bacteria sampler
    Patent number: 6565638
    Abstract: After supporting a petri dish S having a culture medium K contained therein with a given thickness on a petri dish holder 17 of a housing 14, a nozzle holder 13 is clamped at a top of the housing 14. When a motor 19 is energized to rotate a high static pressure fan 18, air is introduced through nozzle openings 12a, and flows through a space between the nozzle 15 and the culture medium K. By setting a distance between the nozzle and the culture medium to 0.5-1.5 mm, a high collection efficiency can be attained.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: May 20, 2003
    Assignee: Midori Anzen Co., Ltd.
    Inventors: Naoki Sugita, Yutaka Hatta, Takeshi Yamada, Yukihiro Nakata