ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,280, issued on Jan. 27, was assigned to KYORAKU Co. LTD. (Kyoto, Japan).
"Packaging bag" was invented by Masaaki Sueoka (Tokyo), Shun Morioka (Tokyo) and Yosuke Muroya (Yamato, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A self-standing packaging bag for use in a microwave oven. The packaging bag is made of a flexible film formed into a bag shape, the packaging bag includes a bottom surface portion and a peripheral surface portion provided to rise from the bottom surface portion, the peripheral surface portion includes a front surface portion and a back surface portion facing each other and includes an opening that opens upward, the periphe...