Patents by Inventor Matafumi Ikeda

Matafumi Ikeda 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).

  • Electronic calculating machine
    Patent number: D249093
    Type: Grant
    Filed: August 23, 1977
    Date of Patent: August 22, 1978
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigetoshi Hazama, Matafumi Ikeda, Masafumi Yamagami, Yoshiaki Kobayashi
  • Electronic calculating machine
    Patent number: D251272
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: March 6, 1979
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigetoshi Hazama, Matafumi Ikeda, Masafumi Yamagami, Yoshiaki Kobayashi
  • Calculating machine
    Patent number: D255125
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: May 27, 1980
    Assignee: Sharp Kabushiki Kaisha (Sharp Corp.)
    Inventors: Shigetoshi Hazama, Matafumi Ikeda
  • Calculating machine
    Patent number: D255126
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: May 27, 1980
    Assignee: Sharp Kabushiki Kaisha (Sharp Corp.)
    Inventors: Yoshihisa Ohie, Matafumi Ikeda
  • Electronic calculating machine
    Patent number: D256696
    Type: Grant
    Filed: November 8, 1978
    Date of Patent: September 2, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Matafumi Ikeda
  • Electronic calculating machine
    Patent number: D257045
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: September 23, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Matafumi Ikeda, Tsutomu Yamasaki
  • Electronic calculating machine
    Patent number: D258891
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: April 14, 1981
    Assignee: Sharp Corporation
    Inventors: Isao Kitai, Matafumi Ikeda
  • Combined electronic calculating machine and timepiece
    Patent number: D260904
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: September 22, 1981
    Assignee: Sharp Corporation
    Inventor: Matafumi Ikeda
  • Oil heater
    Patent number: D276363
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: November 13, 1984
    Assignee: Sharp Corporation
    Inventors: Shigetoshi Hazama, Shuzo Sawa, Matafumi Ikeda, Akira Esaki
  • Oil heater
    Patent number: D276365
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: November 13, 1984
    Assignee: Sharp Corporation
    Inventors: Shigetoshi Hazama, Shuzo Sawa, Matafumi Ikeda, Akira Esaki
  • Oil heater
    Patent number: D276366
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: November 13, 1984
    Assignee: Sharp Corporation
    Inventors: Shigetoshi Hazama, Shuzo Sawa, Matafumi Ikeda, Akira Esaki
  • Oil heater
    Patent number: D277600
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: February 12, 1985
    Assignee: Sharp Corporation
    Inventors: Shigetoshi Hazama, Shuzo Sawa, Matafumi Ikeda, Akira Esaki
  • Oil heater
    Patent number: D295554
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: May 3, 1988
    Assignee: Sharp Corporation
    Inventors: Shuzo Sawa, Matafumi Ikeda
  • Oil heater
    Patent number: D296358
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: June 21, 1988
    Assignee: Sharp Corporation
    Inventors: Shuzo Sawa, Matafumi Ikeda
  • Vacuum cleaner
    Patent number: D302876
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: August 15, 1989
    Assignee: Sharp Corporation
    Inventors: Matafumi Ikeda, Chikashi Kuriya, Mika Nakajima
  • Vacuum cleaner
    Patent number: D307658
    Type: Grant
    Filed: July 30, 1987
    Date of Patent: May 1, 1990
    Assignee: Sharp Corporation
    Inventors: Matafumi Ikeda, Chikashi Kuriya, Mika Nakajima
  • Vacuum cleaner
    Patent number: D315042
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: February 26, 1991
    Assignee: Sharp Corporation
    Inventor: Matafumi Ikeda
  • Vacuum cleaner
    Patent number: D315431
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: March 12, 1991
    Assignee: Sharp Corporation
    Inventors: Matafumi Ikeda, Chikashi Kuriya, Mika Nakajima
  • Vacuum cleaner
    Patent number: D325273
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: April 7, 1992
    Assignee: Sharp Corporation
    Inventors: Matafumi Ikeda, Chikashi Kuriya
  • Vacuum cleaner
    Patent number: D325274
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: April 7, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Matafumi Ikeda