Responsible for the construction of many roads and bridges, including the Whitehurst Freeway, the Tidal Basin Bridge, and an extension to the Baltimore-Washington Parkway.
A contemporary example of a modern-day inventor is Lonnie George Johnson, an engineer. Johnson invented the Super Soaker water gun, which was the top-selling toy in the United States in 1991 and 1992. In 1980 Johnson formed his own law firm and licensed the Super Soaker water gun to Larami Corporation. Two years later the Super Soaker generated over 0 million in retail sales and became the best selling toy in America. Larami Corporation was eventually purchased by Hasbro, the second largest toy manufacturer in the world. Over the years, Super Soaker sales have totaled close to one billion dollars. Johnson reinvested a majority of his earnings from the Super Soaker into research and development for his energy technology companies – 'It's who I am, it's what I do.' Currently,[when?] Johnson holds over 80 patents, with over 20 more pending, and is the author of several publications on spacecraft power systems.