International Art Publishing Co. Ltd. (1898-1914) New York, NY
A publisher of many artist signed holiday and patriotic postcards. Published over 3000 holiday cards by Ellen H. Clapsaddle alone. They also owned the Wolf Company that also produced postcards. All their cards were printed in Germany.
The United States Postal Service began issuing pre-stamped postal cards in 1873. The postal cards came about because the public was looking for an easier way to send quick notes. The USPS was the only establishment allowed to print postcards, and it held its monopoly until May 19, 1898, when Congress passed the Private Mailing Card Act which allowed private publishers and printers to produce postcards. The public could mail the private mailing cards for 1¢ instead of the letter rate of 2¢. The term "private mailing card" came into use because the USPS wanted to keep the postcards it produced distinguishable from those being produced privately, so it was required that private publishers print "Private Mailing Card" on the backs of their cards. Postcards went through many phases when particular design features were popular, so even if a postcard is not dated or was never mailed, it is still possible to determine an approximate time when it was printed.