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…
Tag: roller
This Day in Patent History - On December 9, 1884, L. M. Richardson patented roller skates with ball bearings
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…
This Day in Patent History - On November 11, 1986, Therapeutic roller/walker was patented
On November 11, 1986, Therapeutic roller/walker was patented. Patent Information Publication…