In 1913, John married Jeanette Winters, whom he had met in Los Angeles. He designed a home for them in Chicago they called the Bird Center. Now without an architectural practice, John focused on some of his hobbies, including toys. It was at this time that he perfected the design for his Lincoln Logs, an idea he had conceived while in Japan. Construction of the Imperial Hotel required beams to be designed in an interlocking method to make it safe for earthquakes, and John realized that this design could be adapted into a toy version. He used his own funds to bring the idea to market in 1918 as the Red Square Toy Company (so named after his father's famous symbol). The toys were notched miniature logs about in diameter that could be arranged to build miniature log cabins. Wright received a patent on August 31, 1920, and had the name registered on August 28, 1923. Wright later sold the patent which became one of the most popular toys ever designed.