- PATENT NUMBER - PATENT NAME 1891 – US462795A – method of producing rain-fall 1914 – US1103490A – rain maker (balloon images) 1917 – US1225521A – protection from poisonous gas in warfare 1920 – US1338343A – process and apparatus for the production of intense artificial clouds, fogs, or mists 1924 – US1512783A – composition for … Continue reading Weather Modification Patents