Decades: 10s 20s 30s 40s 50s - 60s - 70s 80s 90s 100s 110s
Years: 58 59 60 61 62 - 63 - 64 65 66 67 68
Births
Deaths
... until one finds the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction. The device is covered by US patents ...