One of the first U.S. patents granted was to Oliver Evans in 1790 for his automatic gristmill. The mill produced flour from grain in a continuous process that required only one labourer to set the mill in motion.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP09068035
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
Same folder images: