Electric mousetrap

This more recent type of mousetrap delivers a lethal dose of electricity when the rodent completes the circuit by contacting two electrodes located either at the entrance or between the entrance and the bait. The electrodes are housed in an insulated or plastic box to prevent accidental injury to humans and pets. They can be designed for single-catch domestic use or large multiple-catch commercial use. See U.S. Patent 4,250,655 and U.S. Patent 4,780,985

Mouth mousetrap

This lightweight mousetrap consists of a set of plastic jaws operated by a coiled spring and triggering mechanism inside the jaws, where the bait is held. The trigger snaps the jaws shut, killing the rodent.