Patents by Inventor Oscar Mitchell
Oscar Mitchell 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: 11965192Abstract: The present invention provides engineered penicillin G acylase (PGA) enzymes having improved properties, polynucleotides encoding such enzymes, compositions including the enzymes, and methods of using the enzymes.Type: GrantFiled: November 30, 2021Date of Patent: April 23, 2024Assignee: Codexis, Inc.Inventors: Jovana Nazor, Vesna Mitchell, David Elgart, Katrina W. Lexa, Nikki Dellas, Robert Kevin Orr, Oscar Alvizo, Ravi David Garcia, Judy Victoria Antonio Viduya, Courtney Dianne Moffett
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Patent number: 7853014Abstract: A data encryption method performed with ring arithmetic operations using a residue number multiplication process wherein a first conversion to a first basis is done using a mixed radix system and a second conversion to a second basis is done using a mixed radix system. In some embodiments, a modulus C is be chosen of the form 2w?L, wherein C is a w-bit number and L is a low Hamming weight odd integer less than 2(w?1)/2. And in some of those embodiments, the residue mod C is calculated via several steps. P is split into 2 w-bit words H1 and L1. S1 is calculated as equal to L1+(H12x1)+(H12x2)+ . . . +(H12xk)+H1. S1 is split into two w-bit words H2 and L2. S2 is computed as being equal to L2+(H22x1)+(H22x2)+ . . . +(H22xk)+H2. S3 is computed as being equal to S2+(2x1+ . . . +2xk+1). And the residue is determined by comparing S3 to 2w. If S3<2w, then the residue equals S2. If S3?2w, then the residue equals S3?2w.Type: GrantFiled: February 27, 2007Date of Patent: December 14, 2010Assignee: nCipher Corporation LimitedInventors: George Robert Blakley, Rajat Datta, Oscar Mitchell, Kyle Stein
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Patent number: 7671586Abstract: An inspection system positions a balancing shim to asymmetrically balance a magnetic field generated by an inductive sensor, which forms part of the inspection system. Additionally, relays and capacitors used to tune the inductive sensor to a desired resonance frequency are geometrically arranged to minimize electrical interference generated by operation of the relays and capacitors. A shielding device, which may be formed on a printed circuit board, protects a magnetic field generated by the inductive sensor from external electromagnetic interference. A slot positioned in the inductive sensor may be used to tune a resonant mode of the inductive sensor to accurately and particularly detect metallic shanks and/or other metallic objects in shoes, socks, and/or clothing.Type: GrantFiled: December 12, 2007Date of Patent: March 2, 2010Assignee: Morpho Detection, Inc.Inventors: Christopher Crowley, Michael Urbach, Oscar Mitchell, Kevin Derby, Adam Drew
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Publication number: 20090153346Abstract: A method and scanner configured to determine whether a person's feet are positioned at a predetermined location of a predetermined scanning area and configured to scan the feet to detect a presence of a metal, an explosive, or other type of target substance.Type: ApplicationFiled: February 20, 2009Publication date: June 18, 2009Inventors: Christopher W. Crowley, Richard Shelby, Oscar Mitchell, Richard Keith Ostrom
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Patent number: 7511514Abstract: A method of operating a passenger screening kiosk system to perform at least one verify a passenger's identity, detect the presence of an explosive material, and detect the presence of a metallic material includes initiating a prompt to be issued by the passenger screening kiosk system to prompt the passenger to enter the passenger screening kiosk system, prompting the passenger to enter the passenger screening kiosk system, and determining whether the passenger is within the passenger screening kiosk system.Type: GrantFiled: July 11, 2006Date of Patent: March 31, 2009Assignee: GE Security, Inc.Inventors: Christopher W. Crowley, Richard Shelby, Oscar Mitchell, Richard Keith Ostrom
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Publication number: 20090001975Abstract: An inspection system positions a balancing shim to asymmetrically balance a magnetic field generated by an inductive sensor, which forms part of the inspection system. Additionally, relays and capacitors used to tune the inductive sensor to a desired resonance frequency are geometrically arranged to minimize electrical interference generated by operation of the relays and capacitors. A shielding device, which may be formed on a printed circuit board, protects a magnetic field generated by the inductive sensor from external electromagnetic interference. A slot positioned in the inductive sensor may be used to tune a resonant mode of the inductive sensor to accurately and particularly detect metallic shanks and/or other metallic objects in shoes, socks, and/or clothing.Type: ApplicationFiled: December 12, 2007Publication date: January 1, 2009Inventors: Christopher Crowley, Michael Urbach, Oscar Mitchell, Kevin Derby, Adam Drew
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Patent number: 7397239Abstract: A screening system including a first modality comprising at least one inductive sensor, and a second modality including at least one metal detection coil configured to generate a magnetic field, said induction sensor configured to detect a change in the magnetic field generated by the metal detection coil.Type: GrantFiled: July 11, 2006Date of Patent: July 8, 2008Assignee: GE Security, Inc.Inventors: Christopher W. Crowley, Oscar Mitchell, Todor Petrov
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Patent number: 7327137Abstract: An inspection system positions a balancing shim to asymmetrically balance a magnetic field generated by an inductive sensor, which forms part of the inspection system. Additionally, relays and capacitors used to tune the inductive sensor to a desired resonance frequency are geometrically arranged to minimize electrical interference generated by operation of the relays and capacitors. A shielding device, which may be formed on a printed circuit board, protects a magnetic field generated by the inductive sensor from external electromagnetic interference. A slot positioned in the inductive sensor may be used to tune a resonant mode of the inductive sensor to accurately and particularly detect metallic shanks and/or other metallic objects in shoes, socks, and/or clothing.Type: GrantFiled: November 14, 2006Date of Patent: February 5, 2008Assignee: GE Homeland Protection, Inc.Inventors: Christopher Crowley, Michael Urbach, Oscar Mitchell, Kevin Derby, Adam Drew
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Publication number: 20080012560Abstract: A screening system including a first modality comprising at least one inductive sensor, and a second modality including at least one metal detection coil configured to generate a magnetic field, said induction sensor configured to detect a change in the magnetic field generated by the metal detection coil.Type: ApplicationFiled: July 11, 2006Publication date: January 17, 2008Inventors: Christopher W. Crowley, Oscar Mitchell, Todor Petrov
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Publication number: 20080012699Abstract: A method of operating a passenger screening kiosk system to perform at least one verify a passenger's identity, detect the presence of an explosive material, and detect the presence of a metallic material includes initiating a prompt to be issued by the passenger screening kiosk system to prompt the passenger to enter the passenger screening kiosk system, prompting the passenger to enter the passenger screening kiosk system, and determining whether the passenger is within the passenger screening kiosk system.Type: ApplicationFiled: July 11, 2006Publication date: January 17, 2008Inventors: Christopher W. Crowley, Richard Shelby, Oscar Mitchell, Richard Keith Ostrom
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Publication number: 20070206784Abstract: A data encryption method performed with ring arithmetic operations using a residue number multiplication process wherein a first conversion to a first basis is done using a mixed radix system and a second conversion to a second basis is done using a mixed radix system. In some embodiments, a modulus C is be chosen of the form 2w?L, wherein C is a w-bit number and L is a low Hamming weight odd integer less than 2(w?1)/2. And in some of those embodiments, the residue mod C is calculated via several steps. P is split into 2 w-bit words H1 and L1. S1 is calculated as equal to L1+(H12x1)+(H12x2)+ . . . +(H12xk)+H1. S1 is split into two w-bit words H2 and L2. S2 is computed as being equal to L2+(H22x1)+(H22x2)+ . . . +(H22xk)+H2. S3 is computed as being equal to S2+(2x1+ . . . +2xk+1). And the residue is determined by comparing S3 to 2w. If S3<2w, then the residue equals S2. If S3?2w, then the residue equals S3?2w.Type: ApplicationFiled: February 27, 2007Publication date: September 6, 2007Inventors: George Blakley, Rajat Datta, Oscar Mitchell, Kyle Stein
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Patent number: 7218734Abstract: A data encryption method performed with ring arithmetic operations wherein a modulus C is be chosen of the form 2w?L, wherein C is a w-bit number and L is a low Hamming weight odd integer less than 2(w?1)/2. And in some of those embodiments, the residue mod C is calculated via several steps. P is split into 2 w-bit words H1 and L1. S1 is calculated as equal to L1+(H12x1)+(H12x2)+ . . . +(H12xk)+H1. S1 is split into two w-bit words H2 and L2. S2 is computed as being equal to L2+(H22x1)+(H22x2)+ . . . +(H22xk)+H2. S3 is computed as being equal to S2+(2x1+ . . . +2xk+1). And the residue is determined by comparing S3 to 2w. If S3<2w, then the residue equals S2. If S3?2w, then the residue equals S3?2w.Type: GrantFiled: February 5, 2002Date of Patent: May 15, 2007Assignee: nCiper Corporation LimitedInventors: George Robert Blakely, Rajat Datta, Oscar Mitchell, Kyle Stein
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Publication number: 20030044004Abstract: A data encryption method performed with ring arithmetic operations using a residue number multiplication process wherein a first conversion to a first basis is done using a mixed radix system and a second conversion to a second basis is done using a mixed radix system. In some embodiments, a modulus C is be chosen of the form 2w−L, wherein C is a w-bit number and L is a low Hamming weight odd integer less than 2(w−1)/2. And in some of those embodiments, the residue mod C is calculated via several steps. P is split into 2 w-bit words H1 and L1. S1 is calculated as equal to L1+(H12x1)+(H12x2)+ . . . +(H12xk)+H1. S1 is split into two w-bit words H2 and L2. S2 is computed as being equal to L2+(H22x1)+(H22x2)+ . . . +(H22xk)+H2. S3 is computed as being equal to S2+(2x1+ . . . +2xk+1). And the residue is determined by comparing S3 to 2w. If S3<2w, then the residue equals S2. If S3>2w, then the residue equals S3−2w.Type: ApplicationFiled: February 5, 2002Publication date: March 6, 2003Inventors: George Robert Blakley, Rajat Datta, Oscar Mitchell, Kyle Stein