Wobble Board Precursors

These are the five patent drawings for a physical-fitness exercise device. The inventor was William Madsen of Chicago, Illinois. The 1892 U.S. patent for this device was applied for also in 1892. Its patent nu More

These are the two patent drawings for a physical-fitness exercise device. The inventor was Robert B. McWhirter of Newark, Ohio. The 1925 U.S. patent for this device was applied for in 1923. Its patent number i More

These are eight of the patent drawings for a physical-fitness exercise device. The inventor was Albert C. Wendelken of Marietta, Ohio. The 1926 U.S. patent for this device was applied for in 1925. Its patent n More

These are the three patent drawings for a physical-fitness exercise device. The inventor was Samuel Lightfoot Jordan of Montgomery, Alabama. The 1955 U.S. patent for this device was applied for in 1951. Its pa More

These are two of the drawings for a patent titled "Amusement and Exercising Device." The inventor was William F. Hudson of Philadelphia, Pennsylvania. The 1929 U.S. patent for this device was applied for in 19 More

These are the four patent drawings for a device intended for small children's amusement and exercise. The patent's title is "Combined Rocking and Revolving Chair." The inventors were Chester E. Baum & Robert A More