ALEXANDRIA, Va., June 25 -- United States Patent no. RE50,469, issued on June 24, was assigned to QUALCOMM Inc. (San Diego).

"Tone plan for LTF compression" was invented by Lin Yang (San Diego), Dung Ngoc Doan (San Diego), Bin Tian (San Diego) and Sameer Vermani (San Diego).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method, an apparatus, and a computer program product for wireless communication are provided. In one aspect, an apparatus is configured to transmit user data in a first symbol of a first symbol type. The first symbol type has a first symbol duration, a first frequency bandwidth, and a first tone plan. The first tone plan includes a first valid start tone index, a first valid end tone index, ...