Acacia Research Corp. (ACTG), the patent licensing company run by interim CEO Marvin Key, said its Parthenon Unified Memory Architecture LLC unit has entered into a settlement and patent license agreement with ZTE Corp., resolving litigation pending in the U.S. District Court in Marshall, Texas.

Newport Beach, California-based Acacia didn’t disclose the terms of the settlement and officials couldn’t be reached for comment.

The Parthenon enforcement campaign involves patents related to handsets manufactured in the

U.S. ZTE has less than a 5% of the U.S. handset market, which is dominated by Apple Inc., Samsung Electronics Co. Ltd., LG Electronics, Qualcomm Inc., and Motorola Mobility.

Apple, Samsung, HTC Corp., Motorola and LG represent more than 80% of the handset market in the U.S. and ZTE’s share is less than 5%. As such, the ZTE settlement is likely to be quite modest.

The Parthenon portfolio comprises multiple technologies which are useful for enhancing the performance of mobile and multimedia devices. Two of these technologies include unified memory architectures which allow multiple processes to access shared memory and techniques for creating contiguous virtual memory blocks from disjoint physical memory locations.

The patents in suit are U.S. Patent No. 5,812,789, entitled “Video And/Or Audio Decompression And/Or Compression Device That Shares a Memory Interface;” 5,960,464, entitled “Memory Sharing Architecture For A Decoding In A Computer System;” 6,058,459, entitled “Video/Audio Decompression/Compression Device Including An Arbiter And Method For Accessing A Shared Memory;” 6,427,194, entitled “Electronic System And Method For Display Using A Decoder And Arbiter To Selectively Allow Access To A Shared Memory;” 7,321,368, entitled “Electronic System And Method For Display Using A Decoder And Arbiter To Selectively Allow Access To A Shared Memory;” 7,542,045, entitled “Electronic System And Method For Display Using A Decoder And

Arbiter To Selectively Allow Access To A Shared Memory;” 7,777,753, entitled “Electronic System And Method For Selectively Allowing Access To A Shared Memory;” 8,054,315, entitled “Electronic System And Method For Selectively Allowing Access To A Shared Memory;” 8,681,164, entitled “Electronic System And Method For Selectively Allowing Access To A Shared Memory.”

Parthenon has settled enforcement actions against Qualcomm, Samsung, Motorola and Huawei Technologies Co. Ltd.

It has pending cases against Apple, LG Electronics and HTC.

Shares of Acacia gained 17 cents to $5.82 in trading on Friday, Aug. 5. They have traded between

$2.82 and $10.63 over the past year.