The phrase "patterning upon" refers to the act of copying or imitating a particular design or structure. The antonyms for "patterning upon" are originality, innovation, and creativity. Originality refers to the ability to produce something new, unique, and fresh without imitating or copying an existing design. Innovation refers to the introduction of new ideas, techniques or devices that are different from existing ones. Creativity refers to the ability to produce something imaginative or artistic by using one's own ideas, skills, and resources. Therefore, instead of patterning upon existing designs, it is better to strive for originality, innovation, and creativity to produce something new, fresh, and unique.