
Otto Plattner (Swiss, 1886-1951)

John T Roe (English, 20th Century)

Laboratoire Freyssinge (French, 20th Century)

Manuel Robbe (French, 1872-1936)

Goes Litho. Co. (American, 19th/20th Century)

Anonymous

Laboratoire d'actino-biologie (French, 20th Century)

Laboratoires G. Beytout (French, 20th Century)

Morse, M'Kenney & Company (American, 19th/20th century)

Maurice Louis Henri Neumont (French, 1868-1930)

Anonymous

Laboratoires Longuet (French, 20th Century)

R. Stab (French, 19th/20th century)

Julius Gipkens (German, 1883-1968)

Anonymous

Anonymous

Etablissements Minot (French, 19th/20th century)

Henri-Achille Zo (French, 1873–1933)

Charles Gesmar (French, 1900-1928)