Patents by Inventor Pentti Immonen

Pentti Immonen 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).

  • Filter structure
    Patent number: 8536960
    Abstract: In a filter structure for suppressing a spurious signal, a conductor layer in a printed circuit board includes a pattern with interconnected pattern elements (106 to 114). A pattern element includes a low-impedance conductive region (119) the capacitance of which against a second conductor layer of the printed circuit board is dominant over the inductance. A pattern element includes at least two adjacent high-impedance conductor strips (115, 116) in a first direction, connected to a low-impedance conductive region, and at least two adjacent high-impedance conductor strips (117, 118) in a second direction, connected to the low-impedance conductive region. The inductance of each high-impedance conductor strips is dominant over the capacitance against the second conductor layer. The high-impedance conductor strips form together with the low-impedance conductive region a plurality of resonance points in the frequency range, thus achieving sufficient stop-band width.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: September 17, 2013
    Assignee: Tellabs Oy
    Inventors: Pentti Immonen, Jarno Tervo
  • FILTER STRUCTURE
    Publication number: 20100109813
    Abstract: In a filter structure for suppressing a spurious signal, a conductor layer in a printed circuit board includes a pattern with interconnected pattern elements (106 to 114). A pattern element includes a low-impedance conductive region (119) the capacitance of which against a second conductor layer of the printed circuit board is dominant over the inductance. A pattern element includes at least two adjacent high-impedance conductor strips (115, 116) in a first direction, connected to a low-impedance conductive region, and at least two adjacent high-impedance conductor strips (117, 118) in a second direction, connected to the low-impedance conductive region. The inductance of each high-impedance conductor strips is dominant over the capacitance against the second conductor layer.
    Type: Application
    Filed: October 28, 2009
    Publication date: May 6, 2010
    Applicant: TELLABS OY
    Inventors: Pentti IMMONEN, Jarno TERVO
  • EMI gasket
    Patent number: 7285731
    Abstract: The invention relates to an EMI gasket formed by joining coated steel (3) and a contact backing (1). The coated steel (3) has elongated openings (4), into which projections (2) provided on the contact backing fit, seizing by their edges the edges of the openings.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: October 23, 2007
    Assignee: Tellabs Oy
    Inventors: Petri Kohonen, Pentti Immonen
  • EMI gasket
    Publication number: 20050269118
    Abstract: The invention relates to an EMI gasket formed by joining coated steel (3) and a contact backing (1). The coated steel (3) has elongated openings (4), into which projections (2) provided on the contact backing fit, seizing by their edges the edges of the openings.
    Type: Application
    Filed: May 10, 2005
    Publication date: December 8, 2005
    Inventors: Petri Kohonen, Pentti Immonen