1967 – “Lunar Leaper” – Dr. Howard S. Seifert et al (American)

Taking 400-foot 15-second hops, lunar "pogo sticks" could most forward at about 20 miles an hour—much faster than the four to five miles an hour  of vehicles now being considered for moon exploration. The moon leaper was devised by Dr. Howard S. Seifert, scientist at the United Technology Center at Sunnyvale, Calif. This artist's concept …

1942 – Hopping Tank – Henry Wallace (American)

Patent number: 2371368 Filing date: Oct 16, 1942 Issue date: Mar 13, 1945 See full patent details here. Blurb from patent describiting capabilities and uses. This invention relates to a vehicle, and more particularly to a tank which is propelled by means of an operating leg. One Of the objects of this Invention is to …