Patents by Inventor Masafuku Akatsu

Masafuku Akatsu 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).

  • Key telephone set having interchangeable units
    Patent number: 7519176
    Abstract: A key telephone set comprises a telephone main body, an interchangeable dial button unit, an interchangeable line button unit, and an interchangeable display unit. The interchangeable dial button unit, the interchangeable line button unit and the interchangeable display unit are attached to the telephone main body while they can be detached from the telephone body from a top surface side of the key telephone set without disassembly of the telephone main body.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: April 14, 2009
    Assignee: NEC Infrontia Corporation
    Inventor: Masafuku Akatsu
  • Key telephone set having interchangeable units
    Publication number: 20040247113
    Abstract: A key telephone set comprises a telephone main body, an interchangeable dial button unit, an interchangeable line button unit, and an interchangeable display unit. The interchangeable dial button unit, the interchangeable line button unit and the interchangeable display unit are attached to the telephone main body while they can be detached from the telephone body from a top surface side of the key telephone set without disassembly of the telephone main body.
    Type: Application
    Filed: January 27, 2004
    Publication date: December 9, 2004
    Applicant: NEC INFRONTIA CORPORATION
    Inventor: Masafuku Akatsu
  • Telephone with the display screen
    Patent number: D457870
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: May 28, 2002
    Assignee: NEC Corporation
    Inventors: Fumiyoshi Toyoshima, Masafuku Akatsu, Yuichiro Shibata, Haruo Tsuge, Takayuki Yoshimoto, Akio Kurihara, Masakatsu Takizawa
  • Key telephone set with speaker phone
    Patent number: D298938
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: December 13, 1988
    Assignee: NEC Corporation
    Inventors: Kenichi Morikawa, Masafuku Akatsu, Tatsuya Kato, Seizo Ohta, Takeshi Nakatani
  • Key telephone set
    Patent number: D300926
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: May 2, 1989
    Assignee: NEC Corporation
    Inventors: Kenichi Morikawa, Masafuku Akatsu, Tatsuya Kato, Seizo Ohta, Takeshi Nakatani
  • Telephone
    Patent number: D596612
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 21, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D596613
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 21, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D597060
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 28, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D597061
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 28, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Communication relay exchange control machine
    Patent number: D597519
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: August 4, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Tetsuo Nakano, Makoto Nakayama, Motomasa Igarashi, Hiromitsu Ogura, Masafuku Akatsu, Eiichi Taniguchi, Hiromitsu Nakano, Takeshi Suzuki, Takayuki Izumo, Masaki Kato, Takashi Matsuda
  • Telephone
    Patent number: D600670
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 22, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D600671
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 22, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D601118
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 29, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone
    Patent number: D601119
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 29, 2009
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone set
    Patent number: D342252
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: December 14, 1993
    Assignee: NEC Corporation
    Inventors: Masafuku Akatsu, Akira Abe, Hitoshi Tsuchida, Seizo Ohta, Takeshi Nakatani
  • Telephone
    Patent number: D621381
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: August 10, 2010
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaki Kobayashi, Takaaki Fujii, Masaru Kunii, Jun Tamatsu, Fumiyoshi Toyoshima, Naoki Mori, Noriaki Nozaki, Hiroshi Kamezawa, Toshiki Takeda
  • Telephone set
    Patent number: D345557
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: March 29, 1994
    Assignee: NEC Corporation
    Inventors: Masafuku Akatsu, Akira Abe, Hitoshi Tsuchida, Seizo Ohta, Takeshi Nakatani
  • Telephone
    Patent number: D390563
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: February 10, 1998
    Assignee: NEC Corporation
    Inventors: Masafuku Akatsu, Masakatsu Takizawa, Kozo Maemura, Naoto Fukasawa
  • Telephone
    Patent number: D664519
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: July 31, 2012
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Masaru Kunii, Jun Tamatsu, Tomotaka Sano, Kouji Takeuchi, Daisuke Yumita, Naoki Ozawa
  • Portion of a telephone
    Patent number: D676016
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: February 12, 2013
    Assignee: NEC Infrontia Corporation
    Inventors: Masafuku Akatsu, Eiichi Taniguchi, Tadamine Toh, Jun Tamatsu, Naoki Ozawa