Patents by Inventor Mark David Bedillion
Mark David Bedillion 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).
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Patent number: 8134796Abstract: A bit-patterned magnetic media (BPM) includes with respect to each data track a first sub-track and a second sub-track, each sub-track comprised of a plurality of bit-islands. A transducer head placed over a data track generates a readback signal. Channel response circuitry demodulates the readback signal and detects fine positioning information based on a comparison of a readback signal generated in response to the first sub-track and a readback signal generated in response to the second sub-track.Type: GrantFiled: October 14, 2010Date of Patent: March 13, 2012Assignee: Seagate Technology, LLCInventor: Mark David Bedillion
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Patent number: 7983138Abstract: An apparatus comprises a storage medium, a substrate separated from the storage medium by a gap, and a plurality of spacers defining a distance between the storage medium and the substrate, wherein the spacers include a curved end.Type: GrantFiled: November 30, 2006Date of Patent: July 19, 2011Assignee: Seagate Technology LLCInventors: Mark David Bedillion, Patrick Breckow Chu, Narayanan Ramakrishnan, James Dillon Kiely, Gudrun Ghilaine Agnes De Gersem
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Patent number: 7965459Abstract: A circuit includes a proximity detection component that applies wavelet analysis to a sensed signal from a sensor and responsively provides an output indicative of whether proximity exists between the sensor and an object that causes the sensor to produce the sensed signal.Type: GrantFiled: December 18, 2008Date of Patent: June 21, 2011Assignee: Seagate Technology LLCInventors: Ramakrishnan Narayanan, Ju-il Lee, Mark David Bedillion
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Patent number: 7948337Abstract: An apparatus includes a movable member, and first and second actuators coupled to the movable member at positions offset from a first axis that passes through a centroid of the movable member. A controller independently controls the first and second actuators to exert a first force on the movable member in a direction generally parallel to the first axis, thereby controlling both linear and rotational orientation of the movable member. The apparatus can further include third and fourth actuators coupled to the movable member at positions offset from a second axis that passes through the centroid of the movable member, and the controller can independently controlling third and fourth actuators.Type: GrantFiled: May 31, 2007Date of Patent: May 24, 2011Assignee: Seagate Technology LLCInventors: Patrick Breckow Chu, Narayanan Ramakrishnan, Mark David Bedillion
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Patent number: 7924692Abstract: An apparatus comprises a movable member, first and second rigid members positioned on opposite sides of the movable member, a first suspension assembly connected between a base and the first and second rigid members, a second suspension assembly connected between the first and second rigid members and the movable member, first and second actuators coupled to the first and second rigid members along a first central axis, and third and fourth actuators coupled to the movable member along a second central axis.Type: GrantFiled: January 18, 2007Date of Patent: April 12, 2011Assignee: Seagate Technology LLCInventors: Andre Y. Liem, Mark David Bedillion, Patrick Breckow Chu, Kevin Arthur Gomez, Mark Ian Lutwyche
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Patent number: 7903533Abstract: An apparatus includes a storage medium, and a transducer positioned adjacent to the storage medium, wherein the transducer includes a first electrode and a second electrode, with the width of the first electrode being less than the width of the second electrode. A method including: applying a first voltage to a transducer to write data to a storage medium, and applying a second voltage to the transducer to read data from the storage medium, wherein the magnitude of the first voltage is greater than the magnitude of the second voltage.Type: GrantFiled: April 23, 2007Date of Patent: March 8, 2011Assignee: Seagate Technology LLCInventors: Mark David Bedillion, Andreas Karl Roelofs, Earl Chrzaszcz Johns, Yongjun Zhao, Edward Stephen Skalko
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Patent number: 7903532Abstract: An apparatus comprises a storage medium, a head substrate, wherein the storage medium and the head substrate are separated by a gap, a plurality of electrodes separated from each other, and a support structure positioned in the gap for supporting some of the electrodes. An apparatus comprising a storage medium, a head substrate, wherein the storage medium and the head substrate are separated by a gap, a plurality of posts positioned in the gap, a layer of low friction material positioned on one end of each of the posts, is also described.Type: GrantFiled: October 11, 2006Date of Patent: March 8, 2011Assignee: Seagate Technology LLCInventors: Patrick Breckow Chu, Mark David Bedillion, Earl Chrzaszcz Johns, Mark Ian Lutwyche
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Patent number: 7889627Abstract: An apparatus includes a data storage media and a plurality of heads, the data storage media and heads being structured and arranged for relative movement between the heads and storage media causing the heads to move along a scan path, and an actuator for changing a magnitude of head to media force as the heads move along the scan path. A method for reducing head motion hysteresis is also provided.Type: GrantFiled: November 5, 2007Date of Patent: February 15, 2011Assignee: Seagate Technology LLCInventors: Narayanan Ramakrishnan, Patrick Beckrow Chu, Mark David Bedillion
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Patent number: 7889447Abstract: A method includes: producing a readback signal using a recording head positioned adjacent to a recording medium, amplitude demodulating the readback signal to produce an amplitude demodulated signal, frequency demodulating the readback signal to produce a frequency demodulated signal, and using the amplitude demodulated signal and the frequency demodulated signal to determine contact of the recording head with the recording medium. An apparatus that can be used to implement the method is also provided.Type: GrantFiled: January 14, 2009Date of Patent: February 15, 2011Assignee: Seagate Technology LLCInventors: Juil Lee, Michael Ting, Mark David Bedillion
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Publication number: 20110032637Abstract: A bit-patterned magnetic media (BPM) includes with respect to each data track a first sub-track and a second sub-track, each sub-track comprised of a plurality of bit-islands. A transducer head placed over a data track generates a readback signal. Channel response circuitry demodulates the readback signal and detects fine positioning information based on a comparison of a readback signal generated in response to the first sub-track and a readback signal generated in response to the second sub-track.Type: ApplicationFiled: October 14, 2010Publication date: February 10, 2011Applicant: SEAGATE TECHNOLOGY LLCInventor: Mark David Bedillion
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Patent number: 7885025Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.Type: GrantFiled: October 22, 2008Date of Patent: February 8, 2011Assignee: Seagate Technology LLCInventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien
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Patent number: 7835094Abstract: A bit-patterned magnetic media (BPM) includes with respect to each data track regular bit-islands having a first size and large bit-islands having a second size. The placement of the regular bit-islands and large bit-islands within each data track results in a unique pattern. An amplitude-modulated readback signal is generated in response to a transducer head moving over the bit-patterned media. Based on the amplitude-modulated readback signal, channel response circuitry detects the pattern of regular bit-islands and large bit-islands associated with a particular data track. Based on the detected pattern, the channel response circuitry is able to uniquely identify the data track.Type: GrantFiled: July 2, 2008Date of Patent: November 16, 2010Assignee: Seagate Technology LLCInventor: Mark David Bedillion
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Publication number: 20100177429Abstract: A method includes: producing a readback signal using a recording head positioned adjacent to a recording medium, amplitude demodulating the readback signal to produce an amplitude demodulated signal, frequency demodulating the readback signal to produce a frequency demodulated signal, and using the amplitude demodulated signal and the frequency demodulated signal to determine contact of the recording head with the recording medium. An apparatus that can be used to implement the method is also provided.Type: ApplicationFiled: January 14, 2009Publication date: July 15, 2010Applicant: Seagate Technology LLCInventors: Juil Lee, Michael Ting, Mark David Bedillion
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Publication number: 20100157485Abstract: A circuit includes a proximity detection component that applies wavelet analysis to a sensed signal from a sensor and responsively provides an output indicative of whether proximity exists between the sensor and an object that causes the sensor to produce the sensed signal.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Applicant: Seagate Technology LLCInventors: Ramakrishnan Narayanan, Ju-il Lee, Mark David Bedillion
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Publication number: 20100097714Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.Type: ApplicationFiled: October 22, 2008Publication date: April 22, 2010Applicant: Seagate Technology LLCInventors: Walter Richard Eppler, Inci Ozgunes, Xiangjun Feng, Kevin Arthur Gomez, Mark David Bedillion, Stephen John Wrazien
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Publication number: 20100073808Abstract: In a particular embodiment, a storage system is disclosed that includes a discrete track media having a plurality of concentric data tracks to store data and including a respective plurality of non-magnetic regions to separate adjacent data tracks. The non-magnetic regions include encoded position information. The storage system further includes a controller adapted to adjust a position of a read/write head relative to a center of a particular track based on the encoded position information.Type: ApplicationFiled: September 23, 2008Publication date: March 25, 2010Applicant: Seagate Technology LLCInventors: Walter Richard Eppler, Mark David Bedillion, Darren William Karns
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Publication number: 20100002325Abstract: A bit-patterned magnetic media (BPM) includes with respect to each data track regular bit-islands having a first size and large bit-islands having a second size. The placement of the regular bit-islands and large bit-islands within each data track results in a unique pattern. An amplitude-modulated readback signal is generated in response to a transducer head moving over the bit-patterned media. Based on the amplitude-modulated readback signal, channel response circuitry detects the pattern of regular bit-islands and large bit-islands associated with a particular data track. Based on the detected pattern, the channel response circuitry is able to uniquely identify the data track.Type: ApplicationFiled: July 2, 2008Publication date: January 7, 2010Applicant: Seagate Technology LLCInventor: Mark David Bedillion
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Patent number: 7626894Abstract: An apparatus comprises a moveable arm for positioning an optical transducer adjacent to a storage medium, a stationary light source, and a moveable mirror mounted at a pivot axis of the arm for reflecting light from the light source to the optical transducer. An actuator can be provided for rotating the moveable mirror through an angle of about one half of an angle of rotation of the moveable arm.Type: GrantFiled: April 13, 2005Date of Patent: December 1, 2009Assignee: Seagate Technology LLCInventors: Mark David Bedillion, Patrick Breckow Chu, Kevin Arthur Gomez, Tim Rausch, Edward Charles Gage
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Patent number: 7576942Abstract: A method and system determines the position of a transducer head based on permanent servo marks in which the width of the permanent servo marks is greater than the width of the data tracks they are used to identify. The method includes receiving readback signals in response to the permanent servo marks arranged as a number of null bursts and generating position error signals with respect to each null burst. Region based information is extracted based on the position error signals, and the region based information is used in conjunction with the position error signals to generate region-based displacement estimates with respect to each null burst. The region-based estimates are then combined to generate a final displacement estimate that describes the estimated distance between a transducer head and the centerline of a desired data track.Type: GrantFiled: April 22, 2008Date of Patent: August 18, 2009Assignee: Seagate Technology LLCInventors: Darren William Karns, Mark David Bedillion, Qiang Ling, Mehmet Fatih Erden
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Patent number: 7570451Abstract: A track accessing mechanism includes a track accessing arm actuable by a primary actuation device for accessing concentric data tracks on a storage medium and at least one slider attached to the track accessing arm. The at least one slider includes a servo head configured to read positional information from a plurality of continuous, concentric rings radially spaced apart from each other on a storage medium and a data head configured to read and write user data to the least one concentric data track. At least a portion of each ring includes servo information. The at least one data track is positioned between each continuous, concentric ring on the storage medium.Type: GrantFiled: December 12, 2007Date of Patent: August 4, 2009Assignee: Seagate Technology LLCInventors: Mark David Bedillion, Patrick Breckow Chu, Xinghui Huang, Kevin Arthur Gomez