This course is designed to enable beginners without any prior knowledge on patent drafting to draft patent specifications on their own. Patent Drafting for Beginners: Week 4.Answers: Week 4 Assignment 4. This assignment is of 5 points. Each question is of 1 point. Birmingham mail box. Modern Power Electronics: P. C. Sen. 3. Power Electronics and AC Drives: B. K. Bose, Prentice Hall, NJ, (1985). 4. Encouragement to complete NPTEL Courses. Assignment problems: Hungarian method for solution of Assignment problems.