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Is it possible to do search class numbers based on the title, text or description related to the class. On EPO and WIPO one can search for classes based on text search.
I could not find any such feature on USPTO. Number search is only available with USPTO.
Recently the US and EPO adopted a new merged classification system CPC. I would use the EPO's CPC page to keyword search for classes and then use those classes in a US search by CPC classification.
Look at the classification here. You can download the pdf and search in this.
http://www.uspto.gov/web/patents/classification/selectnumwithtitle.htm
Furthermore you can use the uspto advanced search and use the operater ccl/ (current classification):
