MPEP Chapter 400: Representative of Applicant or Owner — Study Guide
Chapter 400 covers who may represent applicants before the USPTO: registered practitioners, power of attorney, and the rules for acting on a client's behalf. Authority-to-act questions are exam favorites.
- of released exam questions
- ~2.5%
- MPEP pages
- 61
- guided lectures
- 1
- review questions
- 33
What to learn
Key topics in Chapter 400
- Power of attorney
- Who may practice before the USPTO
- Revocation of authority
- Customer numbers and correspondence address
Inside the course
Guided lectures for Chapter 400
- 01Representation Before the USPTO: Practitioners, Powers of Attorney, Correspondence, and Interviews
Plus slides, key terms, quick quizzes, and MPEP-linked references in the full course.
FAQ
Chapter 400 FAQs
How much of the patent bar exam covers MPEP Chapter 400?
About 2.5% of released USPTO exam questions come from Chapter 400 (Representative of Applicant or Owner), based on our analysis of 30 released questions.
How should I study MPEP Chapter 400?
Read the key topics below, then drill exam-style questions with MPEP citations and finish with a timed review. Patent Bar Studio schedules Chapter 400 automatically based on its exam weight and your accuracy.
How long is MPEP Chapter 400?
The chapter spans roughly 61 pages in MPEP 9th Edition, Revision 01.2024 — focus on the key topics listed here rather than reading cover to cover.
Master Chapter 400 with a personal plan
Guided lectures, cited practice questions, and analytics that tell you exactly when this chapter is exam-ready.