3131131 – April 28, 1964 – Electrostatic Mixing in Microbial Conversions 3174150 – March 16, 1965 – Self-Focusing Antenna System 3234357 – February 8, 1966 – Electrically Heated Smoke Producing Device 3274035 – September 20, 1966 – Metallic Composition For Production of Hydroscopic Smoke 3300721 – January 24, 1967 – Means For Communication Through a Layer of Ionized Gases 3313487 – April 11, 1967 – Cloud Seeding Apparatus 3338476 – August 29, 1967 – Heating Device For Use With Aerosol Containers – Referenced in 3990987 3410489 – November 12, 1968 – Automatically Adjustable Airfoil Spray System With Pump 3429507 – February 25, 1969 – Rainmaker 3432208 – November 7, 1967 – Fluidized Particle Dispenser 3441214 – April 29, 1969 – Method And Apparatus For Seeding Clouds
1338343 – April 27, 1920 – Process And Apparatus For The Production of Intense Artificial Clouds, Fogs, or Mists 1619183 – March 1, 1927 – Process of Producing Smoke Clouds From Moving Aircraft 1631753 – June 7, 1927 – Electric Heater – Referenced in 3990987 1665267 – April 10, 1928 – Process of Producing Artificial Fogs 1892132 – December 27, 1932 – Atomizing Attachment For Airplane Engine Exhausts 1928963 – October 3, 1933 – Electrical System And Method 1957075 – May 1, 1934 – Airplane Spray Equipment 2097581 – November 2, 1937 – Electric Stream Generator – Referenced in 3990987 2409201 – October 15, 1946 – Smoke Producing Mixture 2476171 – July 18, 1945 – Smoke Screen Generator 2480967 – September 6, 1949 – Aerial Discharge Device 2550324 – April 24, 1951 – Process For Controlling Weather 2582678 – June 15, 1952 – Material Disseminating Apparatus For Airplanes 2591988 – April 8, 1952 – Production of TiO2 Pigments – Referenced in 3899144
3174150 – March 16, 1965 – Self-Focusing Antenna System
3234357 – February 8, 1966 – Electrically Heated Smoke Producing Device
3274035 – September 20, 1966 – Metallic Composition For Production of Hydroscopic Smoke
3300721 – January 24, 1967 – Means For Communication Through a Layer of Ionized Gases
3313487 – April 11, 1967 – Cloud Seeding Apparatus
3338476 – August 29, 1967 – Heating Device For Use With Aerosol Containers – Referenced in 3990987
3410489 – November 12, 1968 – Automatically Adjustable Airfoil Spray System With Pump
3429507 – February 25, 1969 – Rainmaker
3432208 – November 7, 1967 – Fluidized Particle Dispenser
3441214 – April 29, 1969 – Method And Apparatus For Seeding Clouds