7 Space propulsion systems, namely, rocket engines; Modular space propulsion systems, namely, motor propulsion apparatus for rockets or cubesats; Modular space propulsion systems, namely, fuel tanks, feed systems, valves and valve drivers, and thrusters; Space propulsion systems, namely, rocket motor propulsion apparatus; Space propulsion systems, namely, engines for space vehicles; Apparatus to generate propellant, namely, spacecraft engines; Propulsion system and architecture for use on satellites, space craft, and spacecraft platforms; Rocket engines not for land vehicles; Aerospace products, not for land use, namely, satellite propulsion system comprised of rocket engines not for land vehicles and combustion engine fuel nozzles; Propellant tanks for use in spacecraft propulsion systems; Space vehicle engines; Space propulsion systems, namely, space vehicle fuel tanks; Space propulsion systems, namely, reusable vehicle fuel tanks