Patents by Inventor Keiichiro Kumagai

Keiichiro Kumagai 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).

  • Card holding structure for portable electronic device
    Patent number: 7238038
    Abstract: In a portable electronic device, a card holding structure includes a plurality of holding members formed on a case to hold a card on a card connector having no holding member. The holding members include a flexible arm with an engaging portion and a stationary portion. The card can be attached/detached to/from the portable electronic device by bending the flexible arm.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: July 3, 2007
    Assignee: NEC Corporation
    Inventor: Keiichiro Kumagai
  • Card holding structure for portable electronic device
    Publication number: 20050135052
    Abstract: In a portable electronic device, a card holding structure includes a plurality of holding members formed on a case to hold a card on a card connector having no holding member. The holding members include a flexible arm with an engaging portion and a stationary portion. The card can be attached/detached to/from the portable electronic device by bending the flexible arm.
    Type: Application
    Filed: November 22, 2004
    Publication date: June 23, 2005
    Inventor: Keiichiro Kumagai
  • Light diffusion unit
    Patent number: 6644822
    Abstract: A light diffusion unit includes (a) a substrate formed with a first hole, (b) a case formed with a second hole and covering the substrate therewith, (c) a light source mounted on the substrate, (d) a light diffuser arranged in the second hole of the case for externally radiating a light emitted from the light source, and (e) a light guide arranged between the substrate and the light diffuser for introducing a light emitted from the light source, to the light diffuser, the light guide partially making close contact with the light diffuser and being partially arranged in the first hole of the substrate.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: November 11, 2003
    Assignee: NEC Corporation
    Inventor: Keiichiro Kumagai
  • Display panel structure with a reinforced sealing member
    Patent number: 6462803
    Abstract: In a display panel structure, a display panel is interposed between a transparent member and a metal sealing member. The edge portions of the sealing member are cemented to edge portions of the transparent member by adhesive so that the display panel is air-tightly sealed from the outside. The sealing member is integrally formed with a lattice of outwardly raised ribs for adding rigidity to the sealing member.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: October 8, 2002
    Assignee: NEC Corporation
    Inventors: Keiichiro Kumagai, Mitsuru Kuroda
  • Light diffusion unit
    Publication number: 20020034070
    Abstract: A light diffusion unit includes (a) a substrate formed with a first hole, (b) a case formed with a second hole and covering the substrate therewith, (c) a light source mounted on the substrate, (d) a light diffuser arranged in the second hole of the case for externally radiating a light emitted from the light source, and (e) a light guide arranged between the substrate and the light diffuser for introducing a light emitted from the light source, to the light diffuser, the light guide partially making close contact with the light diffuser and being partially arranged in the first hole of the substrate.
    Type: Application
    Filed: September 19, 2001
    Publication date: March 21, 2002
    Applicant: NEC Corporation
    Inventor: Keiichiro Kumagai
  • Portable radio having retractable keys, wherein the keys retract within the housing upon movement of a retraction accuator
    Patent number: 6314274
    Abstract: A portable radio communication apparatus having a key protruding mechanism is disclosed. A key operation board has a plurality of keys mounted thereon, and the key operation board is moved such that the keys protrude from the housing when the apparatus is used and retract within the housing when the apparatus is not used.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: November 6, 2001
    Assignee: NEC Corporation
    Inventor: Keiichiro Kumagai
  • Display panel structure with a reinforced sealing member
    Publication number: 20010035931
    Abstract: In a display panel structure, a display panel is interposed between a transparent member and a metal sealing member. The edge portions of the sealing member are cemented to edge portions of the transparent member by adhesive so that the display panel is air-tightly sealed from the outside. The sealing member is integrally formed with a lattice of outwardly raised ribs for adding rigidity to the sealing member.
    Type: Application
    Filed: April 4, 2001
    Publication date: November 1, 2001
    Inventors: Keiichiro Kumagai, Mitsuru Kuroda