Step 4

On the left side of the page listing subclasses, there will be a letter "P" next to each subclass. Once you're ready to look at the patents under a subclass, all you need to do is click on that "P."

This will bring up a list of all U.S. patents listed under that class/subclass.

Take a look at the titles. Do they seem similar to the invention you've been working with?

If so, click on the title or number of the patent and read the abstract. This will tell you if you're on the right track.

If you like what you see, proceed to the 5th and final step.

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