De acuerdo con la Brewster Kaleidoscope Society, "While Brewster was granted a patent for his kaleidoscope, as well as acknowledgment and acclaim for his invention, he did not realize any remuneration. Others did, however. There was some fault with the patent registration, and before Brewster could claim any financial rewards, kaleldoscopes were quickly manufactured by aggressive entrepreneurs who sold hundreds of thousands with great financial success for themselves.
