Patents by Inventor Christopher C. Dumas
Christopher C. Dumas 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: 9870472Abstract: Systems and methods for preventing attachment of malign code to unused firmware memory are described. In some embodiments, an Information Handling System (IHS) may include a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: read contents of a non-volatile memory (NVM); and determine that the NVM does not include malign code stored thereon, at least in part, by determining that selected memory locations in the NVM where firmware is not stored contain pre-determined values.Type: GrantFiled: November 18, 2015Date of Patent: January 16, 2018Assignee: Dell Products, L.P.Inventors: Christopher C. Dumas, Alaric Joaquim Narcissius Silveira, Lisa B. Treweek
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Patent number: 9659171Abstract: In accordance with embodiments of the present disclosure, a method may include storing a system fingerprint of an information handling system, the system fingerprint comprising information associated with one or more information handling resources of the information handling system recorded during creation of the system fingerprint including information regarding a security seed, wherein the security seed comprises a value stored at a location of a non-transitory computer readable medium integral to an information handling resource of the one or more information handling resources. The method may also include during a verification mode, based on the information in the system fingerprint, determining whether potential tampering of the information handling system has occurred, and if potential tampering has occurred, issuing an alert indicating potential tampering with the information handling system.Type: GrantFiled: August 21, 2015Date of Patent: May 23, 2017Assignee: Dell Producrs L.P.Inventors: Lisa B. Treweek, Christopher C. Dumas, Alaric J. N. Silveira
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Publication number: 20170140149Abstract: Systems and methods for preventing attachment of malign code to unused firmware memory are described. In some embodiments, an Information Handling System (IHS) may include a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: read contents of a non-volatile memory (NVM); and determine that the NVM does not include malign code stored thereon, at least in part, by determining that selected memory locations in the NVM where firmware is not stored contain pre-determined values.Type: ApplicationFiled: November 18, 2015Publication date: May 18, 2017Applicant: DELL PRODUCTS, L.P.Inventors: Christopher C. Dumas, Alaric Joaquim Narcissius Silveira, Lisa B. Treweek
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Publication number: 20170053116Abstract: In accordance with embodiments of the present disclosure, a method may include storing a system fingerprint of an information handling system, the system fingerprint comprising information associated with one or more information handling resources of the information handling system recorded during creation of the system fingerprint including information regarding a security seed, wherein the security seed comprises a value stored at a location of a non-transitory computer readable medium integral to an information handling resource of the one or more information handling resources. The method may also include during a verification mode, based on the information in the system fingerprint, determining whether potential tampering of the information handling system has occurred, and if potential tampering has occurred, issuing an alert indicating potential tampering with the information handling system.Type: ApplicationFiled: August 21, 2015Publication date: February 23, 2017Inventors: Lisa B. Treweek, Christopher C. Dumas, Alaric J. N. Silveira
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Patent number: 8671298Abstract: A method may include: calculating approximate power requirements of components, the components supplied with electrical energy from a plurality of power supplies, each of one or more of the plurality of power supplies capable of being enabled and disabled from supplying electrical energy to the components; determining a set of possible configurations of the plurality of power supplies such that for each possible configuration, enabled power supplies of the possible configuration have adequate aggregate capacity to deliver the approximate power requirements and switching to the possible configuration from a then-present configuration would require no more than one of then-disabled power supplies be enabled and no more than one of then-enabled power supplies be disabled; and determining which of the set of possible configurations has the highest expected power efficiency.Type: GrantFiled: February 17, 2011Date of Patent: March 11, 2014Assignee: Dell Products L.P.Inventors: Christopher C. Dumas, Ashish Munjal
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Publication number: 20120216055Abstract: A method may include: calculating approximate power requirements of components, the components supplied with electrical energy from a plurality of power supplies, each of one or more of the plurality of power supplies capable of being enabled and disabled from supplying electrical energy to the components; determining a set of possible configurations of the plurality of power supplies such that for each possible configuration, enabled power supplies of the possible configuration have adequate aggregate capacity to deliver the approximate power requirements and switching to the possible configuration from a then-present configuration would require no more than one of then-disabled power supplies be enabled and no more than one of then-enabled power supplies be disabled; and determining which of the set of possible configurations has the highest expected power efficiency.Type: ApplicationFiled: February 17, 2011Publication date: August 23, 2012Applicant: DELL PRODUCTS L.P.Inventors: Christopher C. Dumas, Ashish Munjal
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Patent number: 4825852Abstract: A continuous passive motion device comprises a base and femoral and tibial supports which rotate about a first pivot point located at the knee, the femoral support also rotating about a pivot point which comprises an extension of the base and is located adjacent the patient's hip. The motor is located in the base beyond the end of the travel of drive rods which extend from the base to the tibial support. The motor drives the foot of these rods forward and backward along the base. The drive rods move from a nearly horizontal positon relative to the base up to a vertical positon and past this vertical position. A camming mechanism is provided coupling the upper end of the drive rods to the tibial support, the camming mechanism being engaged when the drive rods are nearly vertical, to provide additional rotational force to the tibial support which is conveyed to the knee joint. In this way, a powerful bending force is conveyed to the knee, to thereby provide the necessary rehabilitating force to the knee joint.Type: GrantFiled: June 7, 1988Date of Patent: May 2, 1989Assignee: Sutter Biomedical, Inc.Inventors: Carmen E. Genovese, David B. Patch, David A. Westerfield, John T. Gross, Christopher C. Dumas
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Patent number: 4576148Abstract: A continuous passive motion therapy device with drive means carried on the patients hand or arm having a gear train extending down the patients hand and movable drive arms connectable at a plurality of locations along the gear train to selectively exercise the metacarpophalangeal joint or the interphalangeal joint.Type: GrantFiled: February 3, 1984Date of Patent: March 18, 1986Assignee: Sutter Biomedical, Inc.Inventors: Richard J. Koerner, Christopher C. Dumas, Philip J. Filia, Ronald L. Lawrence, David B. Petch