There's no general IP bar. There is something that is colloquially known as the "patent bar"--more formally, "registration to practice before the U.S. Patent & Trademark Office" (USPTO).
Despite that language, though, this registration has nothing to do with trademarks. It's just about patents.
The patent bar focuses on utility patents. From what I've heard, there may be like 1-2 design questions max on each exam. So you could pass that exam without knowing anything about design patents.
"[T]he USPTO published an FRN implementing the suggested changes. These changes include: (1) requiring the USPTO to review certain applicant degrees in Category B every three years to determine whether they should be moved to Category A, (2) making ...all Bachelor of Science in computer science degrees from an accredited university or college will be accepted under Category A..."