Marathon Patent Group, Inc. announced that its subsidiary Relay IP has filed patent infringement lawsuits in the United States District Court for the District of Delaware against Sprint Nextel Corporation, Juniper Networks, Cisco Systems, Bloomberg L.P., Hitachi Cable America, D-Link Corporation, Avaya, Hewlett-Packard Company, Enterasys Networks, Extreme Networks, TIBCO Software, BT Group, SAVVIS Inc., Zhone Technologies, Huawei Technologies, Allied Telesis, and Adtran (the "Defendants"). Relay is asserting infringement related to U.S. Patent number 5,331,637, entitled Multicast Routing Using Core Based Trees. The lawsuit alleges that the Defendants have infringed, and continue to infringe, the claims of the patent in suit by using the accused IP Multicast systems and methods covered by the claims of the Relay patent.

Zhone Technologies Inc. announced consolidated unaudited earnings results for the first quarter ended March 31, 2013. For the quarter, the company reported net revenue of $28,379,000 against $27,062,000 a year ago. Operating income was $333,000 against operating loss of $3,354,000 a year ago. Income before income taxes was $262,000 against loss before income tax of $3,381,000 a year ago. Net income was $230,000 or $0.01 per basic and diluted share against net loss of $3,414,000 or $0.11 per basic and diluted share a year ago. Non-GAAP Adjusted EBITDA income was $561,000 against non-GAAP Adjusted LBITDA of $3,117,000 a year ago. Adjusted EBITDA profit was $0.6 million against an adjusted EBITDA loss of $3.1 million a year ago. The company achieved its revenue, gross margin and expense targets thereby generating positive free cash flow from operations and further improving its liquidity. First quarter revenue was driven by new MXK customer growth globally. The company is able to consistently generate profitability as well as positive cash flow from operations. Going forward, the company continues to remain focused on improving that profitability, and expect to be even more profitable in next quarter on moderate revenue growth.

Zhone Technologies Inc. announced that they will report Q1, 2013 results After-Market on Apr 17, 2013