1824—Richard Evans is granted a patent in England for a commercial method of roasting coffee, comprising a cylinder sheet-iron roaster fitted with improved flanges for mixing, a hollow tube and trier for sampling the coffee while roasting, and a means for turning the roaster completely over to empty it.
1825—The pumping percolator, working by steam pressure and by partial vacuum, comes into vogue in France, Germany, Austria, and elsewhere.
1825—The first coffee-pot patent in the United States is issued to Lewis Martelley, New York.
1825—Coffee cultivation is introduced into Hawaii from Rio de Janeiro.
1827—The first patent for a really practicable French coffee percolator is granted to Jacques Augustin Gandais, a manufacturer of plated jewelry in Paris.
1828—Charles Parker, Meriden, Conn., begins work on the original Charles Parker coffee mill.
1829—The first French patent on a coffee mill is granted Colaux et Cie, Molsheim, France.
1829—Établissements Lauzaune begin the manufacture of hand-turned cylinder coffee roasting machines in Paris.
1830—The import duty on coffee in the United States is reduced to two cents a pound.
1831—David Selden is granted a patent in England for a coffee-grinding mill having cones of cast-iron.