1
Anthony L Marifone: Double action folding knife. Carroll F Palmer, October 13, 1998: US05819414 (61 worldwide citation)

Folding knives having a longitudinal sheath handle with a channelled body portion into and out of which a blade pivots about an axis normal to a common plane of the handle and blade between a sheathed position within the handle through an arc to a use position external of the handle and a lock to au ...


2
Anthony L Marifone: Triggered spring ejectable blade sheathed knives. Carroll F Palmer, July 11, 2000: US06085423 (9 worldwide citation)

Sheathed knives are disclosed that have a blade that is ejected via a button triggered spring longitudinally from the sheath into a locked use position in which the sheath then serves as the handle for the blade in the nature of a dagger, an elongated handled rod that slides within the sheath to dra ...