Redirected from 813 BC
Decades: 860s BC 850s BC 840s BC 830s BC 820s BC - 810s BC - 800s BC 790s BC 780s BC 770s BC 760s BC
Significant People
... 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 ...