Cespedes, Frank V., and James Kindley. "Clique Pens: The Writing Implements Division of U.S. Home (Brief Case)." Harvard Business School Teaching Note 914-526, December 2013.
All the while, it is a pristine piece of tech that not only rivals but outdoes the ultra-popular Apple Pencil, in a number of ways described above. So, here we go — an ode to the S Pen!