Patents by Inventor Katherine W. Umpleby

Katherine W. Umpleby 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).

  • EXTENSION OF A LOCAL AREA PHONE SYSTEM TO A WIDE AREA NETWORK WITH HANDOFF FEATURE
    Publication number: 20120069754
    Abstract: A soft switch 134 providing wireless PBX voice services to a local area network (WLAN) is used to extend PBX functionality to the cellular domain. A dual mode remote unit is capable of receiving signals both in the cellular system as well as the WLAN. The cellular system is comprised of a data-bearing path and a voice-bearing path. When the dual mode remote unit is within the WLAN, it communicates both voice over IP (VoIP) signaling as well as session initiation protocol (SIP) control signaling over the WLAN. When the remote unit is outside the WLAN, it communicates voice signaling over the voice-bearing path of the cellular network using a standard cellular voice channel. In parallel, it uses the data-bearing path of the cellular network to transmit SIP control signaling.
    Type: Application
    Filed: July 13, 2011
    Publication date: March 22, 2012
    Inventors: Gene W. Marsh, Carlos Soledade, Katherine W. Umpleby
  • Extension of a local area phone system to a wide area network with handoff features
    Patent number: 8005070
    Abstract: A soft switch 134 providing wireless PBX voice services to a local area network (WLAN) is used to extend PBX functionality to the cellular domain. A dual mode remote unit is capable of receiving signals both in the cellular system as well as the WLAN. The cellular system is comprised of a data-bearing path and a voice-bearing path. When the dual mode remote unit is within the WLAN, it communicates both voice over IP (VoIP) signaling as well as session initiation protocol (SIP) control signaling over the WLAN. When the remote unit is outside the WLAN, it communicates voice signaling over the voice-bearing path of the cellular network using a standard cellular voice channel. In parallel, it uses the data-bearing path of the cellular network to transmit SIP control signaling.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: August 23, 2011
    Assignee: Lon Communication Mgmt. LLC
    Inventors: Gene W. Marsh, Carlos Soledade, Katherine W. Umpleby