Searching for patents? Have you tried the USPTO Manual of Classification? You ought to. ClassClarify can help.

     ClassClarify is a software tool designed to aid researchers in using the USPTO's Manual of Classification, the tool examiners use to categorize patents. ClassClarify graphically represents the manual and the relationships amongst the classes, it's like a road map through the vast landscape of prior art. Use it to understand how examiners and industry analysts research prior art, and to perfect your searching skills.

     Download the fully functional demo version of the software today and try it out; the licensed full version covers the whole Manual ( some 400+ classes ) and can be ordered online here.