Flying roller coasters are variations of roller coasters configured to simulate flight by harnessing passengers in a prone position (e.g., leaning forward for much of…
On December 9, 1884, L. M. Richardson patented roller skates with ball bearings. This allowed skaters to gain speed with less efforts. This invention transformed…
On November 11, 1986, Therapeutic roller/walker was patented. Patent Information Publication…
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