Patents by Inventor James Chiao
James Chiao 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: 8455827Abstract: A method and apparatus for determining the amount of water in an organic solvent solution, such as a DMSO solution. The apparatus comprises an infrared LED for emitting near infrared light; a laser diode collimator for forming a collimated light beam from the light emitted by the LED; a sample container holder for accepting a sample container containing a sample solution; a photodiode for generating an output signal that is related to the intensity of the collimated light beam after the collimated light beam has passed through the sample solution; and a control means for controlling the stability of the near infrared light emitted by the infrared LED by controlling an amount of current flowing through the infrared LED.Type: GrantFiled: December 21, 2010Date of Patent: June 4, 2013Assignee: EDC Biosystems, Inc.Inventors: James Chiao, Charles A. Reichel, Michael R. Van Tuyl
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Patent number: 8171798Abstract: A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means.Type: GrantFiled: August 25, 2008Date of Patent: May 8, 2012Assignee: EDC Biosystems, Inc.Inventors: Michael R. Van Tuyl, James Chiao
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Publication number: 20090060796Abstract: A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means.Type: ApplicationFiled: August 25, 2008Publication date: March 5, 2009Inventors: Michael R. Van Tuyl, James Chiao, Michael J. Herrmann, Andrew M. Rose
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Patent number: 7426866Abstract: A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means.Type: GrantFiled: December 7, 2005Date of Patent: September 23, 2008Assignee: EDC Biosystems, Inc.Inventors: Michael R. Van Tuyl, James Chiao, Michael J. Herrmann, Andrew M. Rose
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Patent number: 7281413Abstract: The present invention comprises a noncontact method for measuring viscosity and/or surface tension information of a liquid in a liquid containment structure. The steps of the method include exciting a surface of the liquid with an excitation burst of acoustic energy that causes the surface to oscillate; generating a positional data set comprised of a plurality of positional measurements related to the detected position of the surface at a plurality of times after the surface is excited; generating a frequency domain data set from the positional data set, the amplitude spectrum of the frequency domain data set comprising information about the oscillation frequency of at least one vibrational mode of the of the surface as it oscillates; and processing the frequency domain data set and/or the positional data set to yield information about the surface tension and/or viscosity of the liquid. A Fast Fourier Transform technique may be used in generating the frequency domain data set.Type: GrantFiled: March 24, 2005Date of Patent: October 16, 2007Assignee: EDC Biosystems, Inc.Inventors: Roger O. Williams, James Chiao, Humphrey W. Chow, Michael J. Forbush, Andrew M. Rose
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Publication number: 20060144871Abstract: A liquid dispensing apparatus for dispensing droplets of a liquid, and methods for measuring various fluid parameters of the liquid are described. The liquid dispensing apparatus comprises a container having a chamber for holding a liquid. An orifice is positioned at an end of the chamber for dispensing droplets of the liquid, the orifice being configured to retain the liquid in the container if the container is positioned with the orifice facing in a downward direction. An acoustic transducer means is at least partially positioned in the chamber for periodically propagating a focused acoustic beam toward the orifice and through at least some of the liquid while the liquid is contained in the chamber, with the focused acoustic beam being capable of causing a droplet of the liquid to be ejected from the orifice when a free surface of the liquid is within the depth of field of the acoustic transducer means.Type: ApplicationFiled: December 7, 2005Publication date: July 6, 2006Applicant: EDC Biosystems, Inc.Inventors: Michael Van Tuyl, James Chiao, Michael Herrmann, Andrew Rose
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Publication number: 20050193805Abstract: The present invention comprises a noncontact method for measuring viscosity and/or surface tension information of a liquid in a liquid containment structure. The steps of the method include exciting a surface of the liquid with an excitation burst of acoustic energy that causes the surface to oscillate; generating a positional data set comprised of a plurality of positional measurements related to the detected position of the surface at a plurality of times after the surface is excited; generating a frequency domain data set from the positional data set, the amplitude spectrum of the frequency domain data set comprising information about the oscillation frequency of at least one vibrational mode of the of the surface as it oscillates; and processing the frequency domain data set and/or the positional data set to yield information about the surface tension and/or viscosity of the liquid. A Fast Fourier Transform technique may be used in generating the frequency domain data set.Type: ApplicationFiled: March 24, 2005Publication date: September 8, 2005Inventors: Roger Williams, James Chiao, Humphrey Chow, Michael Forbush, Andrew Rose
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Patent number: 6088235Abstract: Magnetic noise cancellation in a single-ended MR preamplifier front end is achieved by forming a balanced ground return path in a flex circuit connecting an MR head to the front end of the preamplifier. The balanced ground return path introduces a noise current in the opposite direction of the original noise current as viewed at the signal input pins of the preamplifier chip. In this manner common mode rejection of the radiated noise component is restored in the single-ended MR preamplifier circuit arrangement.Type: GrantFiled: October 27, 1997Date of Patent: July 11, 2000Assignee: Quantum CorporationInventors: James Chiao, Gary G. Kinoshita
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Patent number: 5552942Abstract: A "zero phase start" optimization circuit for a Partial Response, Maximum Likelihood ("PRML") data channel dynamically determines a more optimal starting phase for the timing recovery process in a synchronous communication or storage system. The disclosed circuit includes a quantizer, a summing junction, either an absolute value or squaring function, and an integrator. A firmware based optimization routine causes a timing control loop to go through a series of timing acquisition modes, each time starting a clocking oscillator at different phase. The optimization circuit calculates the mean squared error between actual and expected sample values from a known frequency preamble pattern for each timing acquisition. The minimum MSE value corresponds to a more optimal starting phase for the timing control loop oscillator.Type: GrantFiled: August 23, 1994Date of Patent: September 3, 1996Assignee: Quantum CorporationInventors: Pablo A. Ziperovich, James Chiao
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Patent number: 5535069Abstract: A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at the center of said media, a plurality of servo grooves on at least one of said sides of said media that have stitched patterns that will alternate on-and-off at twenty kilohertz in the presence of a constant, unmodulated light source. The diskette is magnetically formatted with reference and data tracks recorded in such a way that extremely accurate position determinations can be made by looking at the analog amplitude of the detected tracks and comparing them at different head positions.Type: GrantFiled: June 2, 1995Date of Patent: July 9, 1996Assignee: Insite Peripherals, Inc.Inventors: James Chiao, Jimmy D. Godwin, Alton B. Otis, Jr., Andrew M. Rose, Roger O. Williams, Stephen P. Williams, Mark E. Strysko
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Patent number: 5515212Abstract: A diskette comprising a jacket, a liner material disposed within said jacket, a flat circular media having a magnetic coating on both sides disposed within said liner material, a hub attached at the center of said media, a plurality of servo grooves on at least one of said sides of said media that have stitched patterns that will alternate on-and-off at twenty kilohertz in the presence of a constant, unmodulated light source. The diskette is magnetically formatted with reference and data tracks recorded in such a way that extremely accurate position determinations can be made by looking at the analog amplitude of the detected tracks and comparing them at different head positions.Type: GrantFiled: August 25, 1993Date of Patent: May 7, 1996Assignee: Insite Peripherals, Inc.Inventors: James Chiao, Jimmy D. Godwin, Alton B. Otis, Jr., Andrew M. Rose, Roger O. Williams, Stephen P. Williams, Mark E. Strysko