ALEXANDRIA, Va., June 17 -- United States Patent no. 12,310,649, issued on May 27, was assigned to MINERVA SURGICAL INC. (Santa Clara, Calif.).

"Tissue extraction devices and methods" was invented by Aaron Germain (Campbell, Calif.), Kyle Klein (San Jose, Calif.), Michael D. Walker (San Francisco), Benedek Orczy-Timko (Budapest, Hungary) and Balazs Lesko (Budapest, Hungary).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tissue cutting device has an outer sleeve with a distal window and an inner cutting sleeve which moves past the window to cut tissue. The inner cutting sleeve has a lumen which may have a larger proximal diameter than distal diameter. A perimeter of the window may comprise a dielectric mater...