Patents by Inventor Akira Hiruma

Akira Hiruma 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).

  • Laminated sheet and manufacturing method therefor
    Patent number: 6740606
    Abstract: A laminated sheet having electromagnetic wave shielding effects and a manufacturing method therefor are provided wherein the laminated sheet is transparent, has electromagnetic wave shielding effects and is easily manufactured, moreover, an earthing terminal can be easily connected to the laminated sheet, and post-processing such as ultrasonic adhesion and the like can be easily conducted on the laminated sheet. In the manufacturing method, a conductive mesh-like sheet and a thermoplastic resin sheet are positioned between two molding plates and heated, these sheets are integrally laminated by means of the application of pressure between molding plates. In addition, as the above-mentioned thermoplastic resin sheet, a thermoplastic resin sheet having at least one resin layer which has a thickness which is two times or greater than the thickness of the conductive mesh-like sheet and which has uniform thermal properties is used.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: May 25, 2004
    Assignees: Shoritsu Plastics Ind. Co., Ltd., Kuraray Co., Ltd.
    Inventors: Sadao Umezawa, Kihachiro Ishiguro, Akira Hiruma, Kunihiko Ogawa, Yoshikane Takagi
  • Laminated sheet and manufacturing method therefor
    Publication number: 20020108704
    Abstract: A laminated sheet having electromagnetic wave shielding effects and a manufacturing method therefor are provided wherein the laminated sheet is transparent, has electromagnetic wave shielding effects and is easily manufactured, moreover, an earthing terminal can be easily connected to the laminated sheet, and post-processing such as ultrasonic adhesion and the like can be easily conducted on the laminated sheet.
    Type: Application
    Filed: April 17, 2002
    Publication date: August 15, 2002
    Applicant: SHORITSU PLASTICS IND. CO., LTD.
    Inventors: Sadao Umezawa, Kihachiro Ishiguro, Akira Hiruma, Kunihiko Ogawa, Yoshikane Takagi
  • Method for manufacture of EMI shielding
    Patent number: 6398899
    Abstract: A laminated sheet having electromagnetic wave shielding effects and a manufacturing method therefor are provided wherein the laminated sheet is transparent, has electromagnetic wave shielding effects and is easily manufactured, moreover, an earthing terminal can be easily connected to the laminated sheet, and post-processing such as ultrasonic adhesion and the like can be easily conducted on the laminated sheet.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: June 4, 2002
    Assignees: Shoritsu Plastics Ind. Co., Ltd., Kuraray Co., Ltd.
    Inventors: Sadao Umezawa, Kihachiro Ishiguro, Akira Hiruma, Kunihiko Ogawa, Yoshikane Takagi