Patents by Inventor Charles Robert Ragsdale

Charles Robert Ragsdale 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).

  • Publication number: 20140288400
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like.
    Type: Application
    Filed: June 3, 2014
    Publication date: September 25, 2014
    Applicant: MASIMO Corporation
    Inventors: Mohamed Kheir Diab, Massi Joe E. Kiana, Charles Robert Ragsdale, James M. Lepper
  • Patent number: 8781543
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: July 15, 2014
    Assignee: JPMorgan Chase Bank, National Association
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20120184832
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like.
    Type: Application
    Filed: March 26, 2012
    Publication date: July 19, 2012
    Applicant: MASIMO CORPORATION
    Inventors: Mohamed Kheir Diab, Esmaiel Kiani-Azarbayjany, Charles Robert Ragsdale, James M. Lepper, JR.
  • Patent number: 8145287
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like. In one preferred embodiment, coding resistors could be provided across the light sources to allow additional information about the probe to be coded without added leads. However, any device could be used without it being used in parallel.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: March 27, 2012
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20090270703
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like. In one preferred embodiment, coding resistors could be provided across the light sources to allow additional information about the probe to be coded without added leads. However, any device could be used without it being used in parallel.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 29, 2009
    Applicant: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, JR.
  • Patent number: 7526328
    Abstract: Embodiments of the present disclosure include an optical probe capable of communicating identification information to a patient monitor in addition to signals indicative of intensities of light after attenuation by body tissue. The identification information may indicate operating wavelengths of light sources, indicate a type of probe, such as, for example, that the probe is an adult probe, a pediatric probe, a neonatal probe, a disposable probe, a reusable probe, or the like. The information could also be utilized for security purposes, such as, for example, to ensure that the probe is configured properly for the oximeter, to indicate that the probe is from an authorized supplier, or the like. In one preferred embodiment, coding resistors could be provided across the light sources to allow additional information about the probe to be coded without added leads. However, any device could be used without it being used in parallel.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: April 28, 2009
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Patent number: 7496391
    Abstract: Embodiments of the present disclosure include an oximeter sensor system including a reusable portion including a substantially rigid connector connected to an end of a cable. The substantially rigid connector includes an electronic element housing at least one electronic component of a probe. The system also includes a disposable portion including a flexible wrap comprising a substantially rigid connection port shaped to receive the substantially rigid connector in a releasably securable manner.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: February 24, 2009
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20040147824
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Application
    Filed: January 13, 2004
    Publication date: July 29, 2004
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper
  • Patent number: 6678543
    Abstract: Embodiments of the present disclosure include an oximeter sensor system including a reusable portion including a substantially rigid connector connected to an end of a cable. The substantially rigid connector includes an electronic element housing at least one electronic component of a probe. The system also includes a disposable portion including a flexible wrap comprising a substantially rigid connection port shaped to receive the substantially rigid connector in a releasably securable manner.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: January 13, 2004
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Patent number: 6397091
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: May 28, 2002
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20020062071
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 23, 2002
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper
  • Publication number: 20010020123
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Application
    Filed: November 30, 1999
    Publication date: September 6, 2001
    Inventors: MOHAMED KHEIR DIAB, ESMAIEL KIANI-AZARBAYJANY, CHARLES ROBERT RAGSDALE, JAMES M. LEPPER
  • Patent number: 6011986
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: January 4, 2000
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Esmaiel Kiani-Azarbayjany, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Patent number: 5823950
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: October 20, 1998
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Patent number: 5758644
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 2, 1998
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.