"The new Fourth Edition of this essential trademark resource guides practitioners through the Trademark Trial and Appeal Board's (TTAB) and the federal courts' findings on similarity of products for trademark registration and enforcement. Trademark practitioners who are investigating similarity or dissimilarity of goods at issue can determine, quickly and easily, whether there are any decided cases that have compared with other products the products under consideration by the user, and can find citations for all such cases. The book compiles and indexes 88 years of TTAB and federal court decisions on product comparisons and whether likelihood of confusion was found, and allows practitioners to search the book's entire contents electronically on an accompanying CD-ROM. To help practitioners conduct the most complete and efficient search possible of similar products, the authors have analyzed the findings of the courts and/or the Board in order to impose editorial uniformity on the descriptions of products listed in the cases and have assigned U.S. Class numbers to each product. The Fourth Edition covers TTAB proceedings and court decisions from 1929 through December 2016, and contains more than 90,000 product comparisons, including approximately 1500 comparisons from 2016 alone. The Fourth Edition has been extensively reviewed to refine and reorganize the descriptions and reduce duplicate entries to make it the most complete and effective reference possible. It also includes citations for every comparison, making it easy to find decisions on the Patent and Trademark Office (PTO) website or in Bloomberg BNA's U.S. Patents Quarterly"--