Patents by Inventor Joakim Tolfmans

Joakim Tolfmans 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: 20230095300
    Abstract: A method can be used to synchronize time between nodes of a converter device for high voltage power conversion. The method is performed in a first node of the converter device and includes receiving a time reference from a second node of the converter device, obtaining a delay value for receiving time references from the second node, determining a compensated time by adding the delay value to the time reference, and setting a clock in the first node to be the compensated time.
    Type: Application
    Filed: December 5, 2022
    Publication date: March 30, 2023
    Inventors: Daniel Hallmans, Jimmy Öhman, Johan Österberg, Joakim Tolfmans
  • Patent number: 11532940
    Abstract: A method can be used to synchronize time between nodes of a converter device for high voltage power conversion. The method is performed in a first node of the converter device and includes receiving a time reference from a second node of the converter device, obtaining a delay value for receiving time references from the second node, determining a compensated time by adding the delay value to the time reference, and setting a clock in the first node to be the compensated time.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: December 20, 2022
    Assignee: HITACHI ENERGY SWITZERLAND AG
    Inventors: Daniel Hallmans, Jimmy Ohman, Johan Österberg, Joakim Tolfmans
  • Publication number: 20200274463
    Abstract: A method can be used to synchronize time between nodes of a converter device for high voltage power conversion. The method is performed in a first node of the converter device and includes receiving a time reference from a second node of the converter device, obtaining a delay value for receiving time references from the second node, determining a compensated time by adding the delay value to the time reference, and setting a clock in the first node to be the compensated time.
    Type: Application
    Filed: February 26, 2020
    Publication date: August 27, 2020
    Inventors: Daniel Hallmans, Jimmy Ohman, Johan Österberg, Joakim Tolfmans
  • Patent number: 9430659
    Abstract: Example embodiments provide various techniques for locating cryptographic keys stored in a cache. The cryptographic keys are temporarily stored in the cache until retrieved for use in a cryptographic operation. The cryptographic key may be located or found through reference to its cryptographic key identifier. In an example, a particular cryptographic key may be needed for a cryptographic operation. The cache is first searched to locate this cryptographic key. To locate the cryptographic key, the cryptographic key identifier that is associated with this cryptographic key is provided. In turn, the cryptographic key identifier may be used as an address into the cache. The address identifies a location of the cryptographic key within the cache. The cryptographic key may then be retrieved from the cache at the identified address and then used in the cryptographic operation.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: August 30, 2016
    Assignee: NetApp, Inc.
    Inventor: Joakim Tolfmans
  • Publication number: 20150341170
    Abstract: Example embodiments provide various techniques for locating cryptographic keys stored in a cache. The cryptographic keys are temporarily stored in the cache until retrieved for use in a cryptographic operation. The cryptographic key may be located or found through reference to its cryptographic key identifier. In an example, a particular cryptographic key may be needed for a cryptographic operation. The cache is first searched to locate this cryptographic key. To locate the cryptographic key, the cryptographic key identifier that is associated with this cryptographic key is provided. In turn, the cryptographic key identifier may be used as an address into the cache. The address identifies a location of the cryptographic key within the cache. The cryptographic key may then be retrieved from the cache at the identified address and then used in the cryptographic operation.
    Type: Application
    Filed: July 31, 2015
    Publication date: November 26, 2015
    Inventor: Joakim Tolfmans
  • Patent number: 9129121
    Abstract: Example embodiments provide various techniques for locating cryptographic keys stored in a cache. The cryptographic keys are temporarily stored in the cache until retrieved for use in a cryptographic operation. The cryptographic key may be located or found through reference to its cryptographic key identifier. In an example, a particular cryptographic key may be needed for a cryptographic operation. The cache is first searched to locate this cryptographic key. To locate the cryptographic key, the cryptographic key identifier that is associated with this cryptographic key is provided. In turn, the cryptographic key identifier may be used as an address into the cache. The address identifies a location of the cryptographic key within the cache. The cryptographic key may then be retrieved from the cache at the identified address and then used in the cryptographic operation.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: September 8, 2015
    Assignee: NetApp, Inc.
    Inventor: Joakim Tolfmans
  • Publication number: 20130326233
    Abstract: Example embodiments provide various techniques for locating cryptographic keys stored in a cache. The cryptographic keys are temporarily stored in the cache until retrieved for use in a cryptographic operation. The cryptographic key may be located or found through reference to its cryptographic key identifier. In an example, a particular cryptographic key may be needed for a cryptographic operation. The cache is first searched to locate this cryptographic key. To locate the cryptographic key, the cryptographic key identifier that is associated with this cryptographic key is provided. In turn, the cryptographic key identifier may be used as an address into the cache. The address identifies a location of the cryptographic key within the cache. The cryptographic key may then be retrieved from the cache at the identified address and then used in the cryptographic operation.
    Type: Application
    Filed: July 2, 2013
    Publication date: December 5, 2013
    Applicant: NetApp, Inc.
    Inventor: Joakim Tolfmans
  • Patent number: 8494168
    Abstract: Example embodiments provide various techniques for locating cryptographic keys stored in a cache. The cryptographic keys are temporarily stored in the cache until retrieved for use in a cryptographic operation. The cryptographic key may be located or found through reference to its cryptographic key identifier. In an example, a particular cryptographic key may be needed for a cryptographic operation. The cache is first searched to locate this cryptographic key. To locate the cryptographic key, the cryptographic key identifier that is associated with this cryptographic key is provided. In turn, the cryptographic key identifier may be used as an address into the cache. The address identifies a location of the cryptographic key within the cache. The cryptographic key may then be retrieved from the cache at the identified address and then used in the cryptographic operation.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: July 23, 2013
    Assignee: NetApp, Inc.
    Inventor: Joakim Tolfmans