Hamilton Beach Must Pay Self-Serve Milkshake Maker $3.2 Million

Hamilton Beach and Hershey Creamery must pay Rich Products’s f’real Foods unit $3.2 million in royalties and lost profits for infringing three patents for self-serve milkshake blenders, a federal jury said.

All three patents cover the use of a self-rinsing splash shield after each use of blender.

Jurors found a fourth patent, which covers processes for aeration and liquid-dispensing during mixing of packaged frozen ingredients, wasn’t infringed, according to the verdict delivered Friday in the U.S. District Court for the District of Delaware.

The judge had ruled before trial began that Hamilton Beach and Hershey Creamery’s blenders infringe one claim ...