Patents by Inventor Masaaki Sirakawa

Masaaki Sirakawa 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).

  • Coffee extractor
    Patent number: 5325764
    Abstract: A purifying unit containing an adsorbent is positioned between the discharge outlet of a discharge pipe from which boiled water is discharged, and an extracting chamber, so that boiled water flows into the extracting chamber after detrimental components are removed from the boiled water by the purifying unit. Further, a passage change-over section is provided in order to circulate water through the heater until the water is heated up to a temperature suitable for extraction of coffee, and the passage change-over section allows water to be discharged into the extracting chamber from the discharge outlet of the discharge pipe when the water is heated up to the suitable temperature.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: July 5, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshio Nakamura, Yukitoshi Kunihiro, Yoshiyuki Ujino, Masaaki Sirakawa, Hideo Obata