Patents by Inventor Leonardo Weiss Ferreira Chaves

Leonardo Weiss Ferreira Chaves 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).

  • Patent number: 9165274
    Abstract: A method for tracking events using a radio frequency identification (RFID) tag may include reserving a bit window in a memory on a radio frequency identification (RFID) tag, the bit window having multiple bits, randomly marking one of the bits in the bit window each time a RFID event occurs, counting a number of marked bits in the bit window, and determining a number of the RFID events using the counted number of the marked bits and a size of the bit window.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 20, 2015
    Assignee: SAP SE
    Inventors: Leonardo Weiss Ferreira Chaves, Martin P. Zang, Andy Bruntsch, Sascha H. Alpers
  • Patent number: 8941468
    Abstract: A planogram specifying items of a item type associated with a first location may be determined, and item read events for the items of the item type may be received from a first receiver associated with the first location and from a second receiver associated with a second location. A first counting of the item read events associated with the first receiver may be determined, and a second counting of the item read events associated with the second receiver may be determined. A clustering algorithm may be applied to the first counting and the second counting to determine a first cluster corresponding to a first subset of the items and a second cluster corresponding to a second subset of the items. Then, for each cluster, it may be determined whether the item read events contained therein indicate a presence of the corresponding subset of the items at the second location and in non-compliance with the planogram.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: January 27, 2015
    Assignee: SAP SE
    Inventor: Leonardo Weiss Ferreira Chaves
  • Patent number: 8542103
    Abstract: A method and a system are described for improved reading of Radio Frequency Identification (RFID) tags using correcting codes on sets of electronic tags. A reading device requests information from each of a set of electronic tags. The information includes an identification code and a portion of a codeword, the codeword contains a coded message with identification codes of all tags in the set. The information is received from a subset of the set of tags. Portions of the codeword from the received tag information of the subset of tags are assembled. A decoding component to decode the assembled portions and to construct the coded message from the assembled portions of the codeword. Information is individually received from a remaining set of the tags in the set of tags. An enterprise system processes the received information from all tags in the set.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: September 24, 2013
    Assignee: SAP AG
    Inventors: Leonardo Weiss Ferreira Chaves, Mathis Schwuchow, Andreas Schmidt, Abraham Taherivand
  • Patent number: 8060758
    Abstract: A method for tracing an item may include encrypting item information using an identity-based encryption scheme with a batch number for an item as an encryption key and communicating the encrypted item information for storage on a radio frequency identification (RFID) tag for attachment to the item.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 15, 2011
    Assignee: SAP AG
    Inventors: Florian Kerschbaum, Leonardo Weiss Ferreira Chaves
  • Publication number: 20110050396
    Abstract: A planogram specifying items of a item type associated with a first location may be determined, and item read events for the items of the item type may be received from a first receiver associated with the first location and from a second receiver associated with a second location. A first counting of the item read events associated with the first receiver may be determined, and a second counting of the item read events associated with the second receiver may be determined. A clustering algorithm may be applied to the first counting and the second counting to determine a first cluster corresponding to a first subset of the items and a second cluster corresponding to a second subset of the items. Then, for each cluster, it may be determined whether the item read events contained therein indicate a presence of the corresponding subset of the items at the second location and in non-compliance with the planogram.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 3, 2011
    Applicant: SAP AG
    Inventor: Leonardo Weiss Ferreira Chaves
  • Publication number: 20100102935
    Abstract: A method for tracking events using a radio frequency identification (RFID) tag may include reserving a bit window in a memory on a radio frequency identification (RFID) tag, the bit window having multiple bits, randomly marking one of the bits in the bit window each time a RFID event occurs, counting a number of marked bits in the bit window, and determining a number of the RFID events using the counted number of the marked bits and a size of the bit window.
    Type: Application
    Filed: October 29, 2008
    Publication date: April 29, 2010
    Applicant: SAP AG
    Inventors: Leonardo Weiss Ferreira Chaves, Martin P. Zang, Andy Bruntsch, Sascha H. Alpers
  • Publication number: 20100045444
    Abstract: A method and a system are described for improved reading of Radio Frequency Identification (RFID) tags using correcting codes on sets of electronic tags. In one embodiment, information is requested from each of a set of electronic tags. The information includes an identification code and a portion of a codeword, the codeword contains a coded message with identification codes of all tags in the set. The information is received from a subset of the set of tags. Portions of the codeword from the received tag information of the subset of tags are assembled. The coded message is constructed from the assembled portions of the codeword. Finally, individually receiving information from a remaining set of the tags in the set of tags. In one embodiment, the system includes a set of electronic tags and a reading device to request and receive information from each of the set of electronic tags.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Inventors: LEONARDO WEISS FERREIRA CHAVES, Mathis Schwuchow, Andreas Schmidt, Abraham Taherivand
  • Publication number: 20090323928
    Abstract: A method for tracing an item may include encrypting item information using an identity-based encryption scheme with a batch number for an item as an encryption key and communicating the encrypted item information for storage on a radio frequency identification (RFID) tag for attachment to the item.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 31, 2009
    Applicant: SAP AG
    Inventors: Florian Kerschbaum, Leonardo Weiss Ferreira Chaves