1904–05—Douglas Gordon, assignor to Marcus Mason & Co., New York, is granted United States patents on a coffee pulper and a coffee drier.
1905—The A.J. Deer Co., Buffalo (now at Hornell, N.Y.), begins the sale of its Royal electric coffee mills direct to dealers, on the instalment plan, revolutionizing the former practise of selling coffee mills through the hardware jobbers.
1905—The Henneman direct-flame gas coffee roaster, a Dutch machine, is introduced into the United States market by C.A. Cross, Fitchburg, Mass.
1905—H.L. Johnston is granted a United States patent on a coffee mill which he assigns to the Hobart Manufacturing Co., Troy, Ohio.
1905—Frederick A. Cauchois introduces his Private Estate coffee maker, a filtration device employing Japanese filter paper.
1905—Finley Acker, Philadelphia, is granted a United States patent on a coffee percolator, employing "porous or bibulous paper" as a filtering medium and having side perforations.
1905—A coffee exchange is opened in Trieste, Austria-Hungary.
1905—The Kaffee-Handels Aktiengesellschaft, Bremen, is granted a German patent on a process for freeing coffee from caffein.
1906—H.D. Kelly, Kansas City, Mo., is granted a United States patent on the Kellum Thermo Automatic coffee urn, employing a coffee extractor in which the ground coffee is continually agitated before percolation by a vacuum process. Sixteen patents follow.
1906—G. Washington, an American chemist (born in Belgium of English parents), living temporarily in Guatemala City, invents a refined (soluble) coffee.