Patents by Inventor Dave Dalglish

Dave Dalglish 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).

  • Selective cloaking circuit for use in radio frequency identification and method of cloaking RFID tags
    Patent number: 7064653
    Abstract: The output to the antenna of an RFID tag or label is disconnected from the balance of the RFID chip by means of a series switch activated in response to a logic command, CLOAK, generated by the RFID chip. Activation of the switch disconnects the output to the antenna of the RFID tag without disconnecting its input. The output to the antenna is thus disconnected for a time sufficient to allow the remaining RFID tags in an RF interrogation field to be identified. However, the input of the antenna remains connected and is capable of receiving at any time, including during the cloaking period commands which can lift the tag out of cloaking and allow it to then selectively output its signal.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: June 20, 2006
    Assignee: Single Chip Systems Corporation
    Inventor: Dave Dalglish
  • Selective cloaking circuit for use in radio frequency identification and method of cloaking RFID tags
    Publication number: 20050270141
    Abstract: The output to the antenna of an RFID tag or label is disconnected from the balance of the RFID chip by means of a series switch activated in response to a logic command, CLOAK, generated by the RFID chip. Activation of the switch disconnects the output to the antenna of the RFID tag without disconnecting its input. The output to the antenna is thus disconnected for a time sufficient to allow the remaining RFID tags in an RF interrogation field to be identified. However, the input of the antenna remains connected and is capable of receiving at any time, including during the cloaking period commands which can lift the tag out of cloaking and allow it to then selectively output its signal.
    Type: Application
    Filed: December 18, 2003
    Publication date: December 8, 2005
    Inventor: Dave Dalglish
  • Selective cloaking circuit for use in a radiofrequency identification and method of cloaking RFID tags
    Patent number: 6690264
    Abstract: The output to the antenna of an RFID tag or label is disconnected from the balance of the RFID chip by means of a series switch activated in response to a logic command, CLOAK, generated by the RFID chip. Activation of the switch disconnects the output to the antenna of the RFID tag without disconnecting its input. The output to the antenna is thus disconnected for a time sufficient to allow the remaining RFID tags in an RF interrogation field to be identified. However, the input of the antenna remains connected and is capable of receiving at any time, including during the cloaking period commands which can lift the tag out of cloaking and allow it to then selectively output its signal.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: February 10, 2004
    Assignee: Single Chip Systems Corporation
    Inventor: Dave Dalglish
  • Selective cloaking circuit for use in a radiofrequency identification and method of cloaking RFID tags
    Publication number: 20020097143
    Abstract: The output to the antenna of an RFID tag or label is disconnected from the balance of the RFID chip by means of a series switch activated in response to a logic command, CLOAK, generated by the RFID chip. Activation of the switch disconnects the output to the antenna of the RFID tag without disconnecting its input. The output to the antenna is thus disconnected for a time sufficient to allow the remaining RFID tags in an RF interrogation field to be identified. However, the input of the antenna remains connected and is capable of receiving at any time, including during the cloaking period commands which can lift the tag out of cloaking and allow it to then selectively output its signal.
    Type: Application
    Filed: January 23, 2001
    Publication date: July 25, 2002
    Inventor: Dave Dalglish