Patents by Inventor Mitsuko Oka

Mitsuko Oka 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).

  • Protective sheets having self-adhesive property used for wearing on clothes and keeping them clean
    Patent number: 5062158
    Abstract: The present invention relates to protective sheets used for wearing on clothes and keeping the clothes clean which have no problem such as slipping off, stripping up, falling down and so on without fixing them on bodies with strings, namely, protective sheets effectively used for aprons and napkins and practically relates to protective sheets which are the above described aprons and napkins consisting of electret sheets whose surface electric charge density is 1.times.10.sup.-10 coulomb/cm.sup.2 or more and weight per square meter is 10 g/m.sup.2 or more and 100 g/m.sup.2 or less.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: November 5, 1991
    Assignee: Toray Industries, Inc.
    Inventors: Mitsuko Oka, Yoshiharu Okumura