ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,423, issued on May 20, was assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co. LTD. (Osaka, Japan).
"Secondary cell" was invented by Shigeki Moriya (Osaka, Japan) and Nobuhiro Sakitani (Tokushima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A secondary cell that is one example of this embodiment comprises a winding-type electrode body in which a positive electrode and a negative electrode are wound with a separator interposed therebetween. The positive electrode has: a positive-electrode collector body; a first positive-electrode mixture layer formed on a first surface of the positive-electrode collector body facing the outer side of...