ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,228,190, issued on Feb. 18.
"Sequential propulsion drive" was invented by Ryan Joseph Cross (Tempe, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sequential propulsion drive assembly is configured to drive a mechanical system. The sequential propulsion drive assembly has a primary output shaft that extends through the motor housing through a forward bulkhead, a central bulkhead, and a rear bulkhead. A collet is joined to a bottom plate and configured to stabilize the primary output shaft. An upper primary shift gear is operatively coupled to the primary output shaft and an upper output gear. An upper electric motor is resting on the central bul...