Patents by Inventor Mayumi Yoshikawa

Mayumi Yoshikawa 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).

  • GRINDING WHEEL AND METHOD OF MANUFACTURING GRINDING WHEEL
    Publication number: 20220080556
    Abstract: Object: To provide a grinding wheel and a method of manufacturing a grinding wheel having added value while providing a suppressed manufacturing cost. Solution Means: The grinding wheel is a grinding wheel including an abrasive portion including nonwoven fabric, wherein the abrasive portion includes an outer peripheral portion formed with the nonwoven fabric including abrasive grains on an outer peripheral side, and an inner peripheral portion formed with the nonwoven fabric not including the abrasive grains, and a ratio of a thickness in a radial direction of the outer peripheral portion to a thickness in a radial direction of the abrasive portion is from 3% to 60%.
    Type: Application
    Filed: December 23, 2019
    Publication date: March 17, 2022
    Inventors: Michihiro Yamahara, Naohiro Nagafuchi, Mayumi Yoshikawa, Masashi Nakayama, Shoichi Masuda
  • Retroreflective elements
    Patent number: 9110236
    Abstract: The present application relates to a pavement marker including a core from which extends protrusions and a cavity between adjacent protrusions. The microsphere lenses are fixed within the cavity by one of a softening material disposed in the core and an adhesive agent disposed in the cavity.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: August 18, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Junichi Saito, Toshihiro Kasai, Yuji Hiroshige, Mayumi Yoshikawa
  • Retroreflective Elements
    Publication number: 20140233102
    Abstract: The present application relates to a pavement marker including a core from which extends protrusions and a cavity between adjacent protrusions. The microsphere lenses are fixed within the cavity by one of a softening material disposed in the core and an adhesive agent disposed in the cavity.
    Type: Application
    Filed: September 20, 2012
    Publication date: August 21, 2014
    Inventors: Junichi Saito, Toshihiro Kasai, Yuji Hiroshige, Mayumi Yoshikawa