Patents by Inventor Yasumasa HAKAMATA

Yasumasa HAKAMATA 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).

  • Air filter, light source device, and air filter manufacturing method
    Patent number: 11229866
    Abstract: An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: January 25, 2022
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kyoichi Murayama, Ryotaro Matui, Yasumasa Hakamata, Koji Maejima
  • Air filter, light source device, and air filter manufacturing method
    Patent number: 11192052
    Abstract: An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: December 7, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kyoichi Murayama, Ryotaro Matui, Yasumasa Hakamata, Koji Maejima
  • AIR FILTER, LIGHT SOURCE DEVICE, AND AIR FILTER MANUFACTURING METHOD
    Publication number: 20190366253
    Abstract: An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.
    Type: Application
    Filed: June 4, 2019
    Publication date: December 5, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Kyoichi MURAYAMA, Ryotaro MATUI, Yasumasa HAKAMATA, Koji MAEJIMA