On a rusted workbench lay a prototype: a squat device the size of a heart-lung machine, brass and acrylic and a lot of hands’ worth of repair. A label on its casing read: LOVE-BITCH v1.1. The model number. The tag was its serial. The initials — RJ — matched one corner of a patent paper, dog-eared and open to a formula no one had bothered to patent right.