Patents by Inventor Rajkumar Copparapu

Rajkumar Copparapu 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).

  • Application programming interface to generate data key pairs
    Patent number: 11671251
    Abstract: A computer-implemented method for providing cryptographic services, including providing key pairs. A key management service receives a web service application programming interface or other such request to generate a key pair. To respond to the request, the key management service obtains a pregenerated key pair that is securely stored and provides the key pair in response to the request.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: June 6, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Rajkumar Copparapu, Peter Da-Ming Zieske, Benjamin Seidenberg, Justin Derby
  • Data reencryption techniques
    Patent number: 11626985
    Abstract: A computer-implemented method for reencrypting data. A key management service receives a web service application programming interface or other request to reencrypt data from a first key to a second key, where the first key and the second key are managed by the key management service on behalf of a user of the service. The key management service response to the request by performing the associated operations and providing a response with the reencrypted data.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: April 11, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Rajkumar Copparapu, Peter Da-Ming Zieske, John Kenneth Beer
  • Voltage source inverter with a voltage offset
    Patent number: 8120306
    Abstract: Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage level, the method comprising sensing a low output frequency condition; determining a DC voltage offset responsive to the low output frequency condition; and applying the DC voltage offset when operating the voltage source inverter resulting in a change to the DC voltage level of the multiple voltage phases.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: February 21, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Sibaprasad Chakrabarti, Rajkumar Copparapu
  • VOLTAGE SOURCE INVERTER WITH A VOLTAGE OFFSET
    Publication number: 20100171456
    Abstract: Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage level, the method comprising sensing a low output frequency condition; determining a DC voltage offset responsive to the low output frequency condition; and applying the DC voltage offset when operating the voltage source inverter resulting in a change to the DC voltage level of the multiple voltage phases.
    Type: Application
    Filed: January 5, 2009
    Publication date: July 8, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: SIBAPRASAD CHAKRABARTI, RAJKUMAR COPPARAPU