Brad Chassee

Recent Articles by Using US Patent Classifications to Enhance Key Word Searching to Achieve Higher Quality Patent Search Results

Using US Patent Classifications to Enhance Key Word Searching to Achieve Higher Quality Patent Search Results

I have found it helpful to think about patent classifications as being large buckets with subclassifications being little buckets within the larger classification buckets. There are currently more than 450 classifications and over 150,000 subclasses. According to the USPTO, “A class generally delineates one technology from another. A Subclass delineates processes, structural features, and functional features of subject matter encompassed with the scope of the class.” It is also important to realize that although every patent has only one primary classification (class and subclass) it may include others as applicable to the patent.