ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,740,665, issued on Sept. 22.
"Automatic portafilter clamping device for espresso machines" was invented by Spencer Bailey (Seattle) and Olaf Bergeson (Seattle).
According to the abstract* released by the U.S. Patent & Trademark Office: "Presented is an automatic portafilter clamping device for clamping a portafilter to a coffee machine. The automatic portafilter clamping device includes a support ring connected to the group head assembly of the coffee machine, and a compression ring configured to rotate relative to the support ring. The compression ring could be rotated relative to the support ring to bring the compression ring in either a locked position or an unlocked position. A ...