Notes:
Patent specification.
Patent no. 224,164, accepted November 6, 1924.
Date of application in the U.K.: May 5, 1924, no. 11,040/24.
Convention date (France): November 2, 1923.
Stamped "Bibliotheek, Bur. Ind. Eigendom, 12 Jan.1925."
Stamped "Openbaar gemaakt den 27.Nov.1924."
