Have there been any attempts at classifying patent classes? I can see that the design classes is one group. I am wondering if it is possible to create groups such as chemistry, manufacturing, etc. Or even at a abstract level for things like processes, widgets. I realize that there will be overlap and cross references.

I am looking for a grouping of patent classes.

  • @George White's answer was 'correct'. However, keeping this open in case there are other responses.
    – nilanjan
    Sep 25, 2013 at 8:50

1 Answer 1


Look no further, it has been done, at least twice!

The examination corp is organized into Technology Centers.

enter image description here

Under that level are Art Units and each art unit is responsible for a handful of classes.

The USPTO recently started transitioning to a new joint US/EPO classification system called CPC that is based on the European system but with more granularity in the leaf nodes. Like the international system, it has a logical top level:

enter image description here


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .