Bruce E. Burdick
Bruce E. Burdick, Intellectual Property Law Attorney - Alton, IL
Posted almost 2 years ago.

That is the TIDM, found at http://tess2.uspto.gov/netahtml/tidm.html
These are called classes, not categories. There are some for goods and some for services. There are no "subcategories", that is something that is used in patent classification.

Bruce E. Burdick
Bruce E. Burdick, Intellectual Property Law Attorney - Alton, IL
Posted almost 2 years ago.

While your promotional essay is informative, I would suggest the Questioner might also view a few of the exceptionally well-done short TMIN videos at http://www.uspto.gov/trademarks/process/TMIN.jsp