ALEXANDRIA, Va., March 24 -- United States Patent no. 12,587,981, issued on March 24, was assigned to PROSE TECHNOLOGIES (SUZHOU) Co. LTD. (Suzhou, China) and PROSE TECHNOLOGIES LLC (Mount Olive, N.J.).

"Network access device and system" was invented by Deping Zhang (Suzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A network access device includes: a first signal transceiver port, configured to transmit and receive a first radio frequency signal in a multiple-input-multiple-output manner; a second signal transceiver port, configured to transmit and receive a second radio frequency signal in a single-input-single-output manner; a signal processing unit, configured to filter and to combine and/or s...