Kathy Jones was an artist with Rookwood pottery.  I am not sure of the dates, but she definitely decorated in the 1929, an example of her signature is shown below.

American artist Clyde Burt (1922-1981) was born in Melrose, Ohio.  His studio art pottery is highly sought and there are even pieces in the Smithsonian American Art Museum.     Clyde Burt is considered an important pioneer of American Studio ceramics.  He won the Art Institute of Chicago Designer-Craftsman Award in 1957.

His mark is a very simple capital CB in a circle.  An example is shown below:

Newcomb College Pottery Operated from 1895-1930’s and is one of the most sought after pottery collectibles.

If you see a JM mark on the pottery, the Potter was Joseph Meyer.  Joseph Meyer “could throw a fine piece of work faster than any man living” said Paul Cox, also a potter at Newcomb.  Meyer created classical shapes which formed a canvas for Newcomb’s very talented decorators.

Examples of his mark:

Marblehead Pottery (1904-1936)  is among the most sought after arts and crafts pottery.  Examples of Marblehead vases are shown below:

This 5″ Marblehead Pottery Vase sold for $2,235 in May 2009. (signed by Hanna Tutt - HT)

This 11.75″ Matte Green Organic form Marblehead vase sold for $1,280 in May 2009:

Taxile Doat (1851-1938) - England (seated)

Taxile Doat was born in England, and was a major figure in French pottery. He influenced Sevres Manufactory to begin manufacturing Art Nouveau. (Doat worked at Sevres from 1877 to 1905). He also had his own kilns in Paris from 1892.  He was also director of the ceramics division of the Art Academy of the People’s University.

Example’s of his Taxile Doat’s signature are below:

Elizabeth McDermitt decorated many beautiful Vellum vases for Rookwood pottery in the early 1900’s.  Her signature is EMC.  These are examples:

Marks on bottom: Rookwood flame mark XIV(1914)/604 Vase #/V (Vellum)/E/EMC (Elizabeth McDermott)

Sara Sax is among Rookwood’s most famous decorators. Sax worked at Rookwood from 1896 - 1931. She loved Peacocks and peacock feathers, and these are often seen on her pieces. She is known for her French Red vases, but she decorated most of the Rookwood glaze lines.

Sara Sax’s SX mark accompanies Rookwood’s 1899 mark below:

Zsolnay Factory started in 1853 by Miklós Zsolnay who established the first manufacture of ceramics for his son Ignác. In 1863 Ignac’s younger brother, Vilmos took over as manager.  The factory’s first major success was reached at the 1873 World Exhibition in Vienna, where Zsolnay received many orders from England, France, Russia, and America.

The success achieved during the 1878 World Exhibition in Paris was tremendous. The jury praised the Zsolnay collection as being unique and gave it the gold medal.  The next steps in this series of successes were Melbourne in 1880, Brussels (1888), Chicago (1893) and Antwerp (1894). At the exhibition organized in 1896, on the occasion of the millenium of the Hungarian Kingdom, the factory introduced its most beautiful pieces, made of eosin. The emperor awarded the Franz Joseph Order to Vilmos Zsolnay, and the city of Pécs gave him the title of Honorary Town Citizen.

After Vilmos Zsolnay’s death, in 1900, his son Miklós took over management and adopted the new Art Nouveau style. In the Austro-Hungarian monarchy and in other neighboring countries, no competitors could be found for the frost-resistant Zsolnay building decorations. Vilmos Zsolnay’s great merit was his invention of several new technologies for the production of ceramics. In the course of his experiments, he developed a base material and glazes that yielded a quality equal to porcelain painting, but which at the same time allowed a much richer use of colours. His technique of firing glazes at high temperatures remains unique even today.  Today, the Zsolnay porcelain Factory holds on to its great traditions, while at the same time stressing the importance of a continuous renewal.

This mark dates from the ~1905 and is the round raised Five Steeple Zsolnay mark and impressed 8049 form number under glaze.

Claude Leffler was born in Ohio on April 20, 1877. While in Zanesville in 1920, Leffler was a decorator at Weller Pottery. He settled in Oakland in 1928 and died there on July 11, 1960. His rare works include landscapes and portraits. These are examples of his signature on Weller Pottery:

Frederick Rothenbusch was an artist at Rookwood in the early 1900’s. He created many lovely Vellum vases. This Rookwood Velum vase is signed “FR” - this is Frederick Rothenbusch’s signature. The Rookwood logo and Roman Numerals XII (1912), the letter V (for vellum), the artist’s signature/cipher, FR (Frederick Rothenbusch), and the production line number 1660, size D.