In the early 1900s, Gund received numerous patents that introduced various mechanisms into plush toys. Once such patent was for what was described as a "springing dog." The design called for a mechanism to be placed inside the stuffed animal which would cause it to jump, "bringing it to life." Another patent was for a walking mechanism which allowed the plush to walk. One of the company's most notable patents was for a "ride-on duck" which was a duck for children to ride on. It had wheels that operated a working duck bill which moved up and down as the wheels turned. The ride-on duck was produced by Gund for approximately 10 years commencing in 1912. Gund also secured many other patents for toys such as the wind-up walking plush, dancing toys, and walking toys.