April 3 every year own A coffee grinder (coffee pot) celebrates a birthdaybecause it was on this day in 1829 that James Carrington patented a manual coffee grinder.

The device for grinding coffee beans greatly simplifies and speeds up the process of preparing coffee. The taste also depends on the degree of grinding.

• In ancient times, people used wooden mortars to grind grains, later ceramic and steel millstones were invented.
• In the modern world, electric coffee makers that work on the principle of a mixer are used.