How are classes and subclasses identified in the USPC?
According to MPEP 902.01, classes and subclasses in the USPC are identified as follows:
“Each class has a title descriptive of its subject matter, is identified by a class number, and is subdivided into a number of subclasses. Each subclass also has a descriptive title, is identified by a subclass number, and the subclass number is an integral number that may contain a decimal portion and/or alpha characters.”
For example, a complete subclass identification might look like 417/161.1A, where 417 is the class number and 161.1A is the subclass number.
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