Search by Patent Sub-class

Use this search method to see the network around the inventors of all patents that the US Patent and Trademark office classified as fitting within a particular technology sub-class.

For example, if you want to see the world of inventors around doped semiconductors, you might enter Main Class 438 (''), Sub Class 151 ('').

While sub-classes are narrow, this search starts from inventors of ALL patents in this sub-class. This comprehensive view means that it gets big really fast, so 1-2 degrees of co-invention at most are recommended, and a short time span.

Select Parameters
Number of degress of co-invention:
Start date (YYYY/MM/DD):
End date:
Use the date the patent was applied for, or the date the USPTO granted it? Application date
Granted date
Main class