Strongly coupled piezoelectric energy harvesters: Optimised design with over 100 mW power, high durability and robustness for self-powered condition monitoring - ScienceDirect
Self-Stabilizing Electric Skateboards : electric skateboard concept
Chicago Roller Skate Co., est. 1905 - Made-in-Chicago Museum
Tony Hawk 31" Popsicle Complete Skateboard with Pro Aluminum Trucks, Truck Hawk, Kids Ages 5+ - Walmart.com
PDF] An electromagnetic rotational energy harvester using sprung eccentric rotor , driven by pseudo-walking motion | Semantic Scholar