Maitake Products, Inc.(MPI), E. Rutherford, NJ announced today that the mark "PET FRACTION" has been registered with the U.S. Patent & Trademark Office as of December 2, 2008 with Reg.# 3,542,114.

PET FRACTION® is a name of MPI's flag-ship product, Maitake D-Fraction®, for the pet version and has been on the U.S. veterinarian market since May, 2005.  Its strong immune enhancement effects for dogs and cats has been confirmed by various researchers in Japan, including Dr. T. Shimada (then with Osaka Prefecture University) and thousands of veterinarians have been using the products in Japan for that purpose. It is now regarded as the top-selling dietary supplement for pets under the category in Japan.

In the United States, Dr. S. Konno of New York Medical College, among the other researchers, has been conducting the studies on growth inhibitory effects of PET FRACTION on various canine cancer cells, such as CF21, CF33 and CL-1 and concluded that it is capable of exerting a significant effect on the growth of those cancer cells.

MPI had initially launched the product under the name of "DVM FRACTION" but has changed it to PET FRACTION® since 2006.