Patents by Inventor Masanori Kumazawa

Masanori Kumazawa 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).

  • Interphone with a TV monitor
    Patent number: D561734
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: February 12, 2008
    Assignee: Aiphone Co., Ltd.
    Inventors: Manabu Yamada, Masanori Kumazawa
  • Portable intercom with a TV monitor
    Patent number: D578993
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: October 21, 2008
    Assignee: Aiphone Co., Ltd.
    Inventors: Manabu Yamada, Masanori Kumazawa