For anyone doubting the existence of the phenomenon of ‘chemtrails’, please take a minute to read through this extensive list of patents from America on equipment and processes used in just such programs. The evidence is clear folks.

United States Patent and Trademark Office
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
2510867 – October 9, 1951 – Method of Crystal Formation and Precipitation
2582678 – June 15, 1952 – Material Disseminating Apparatus For Airplanes
2591988 – April 8, 1952 – Production of TiO2 Pigments – Referenced in 3899144
2614083 – October 14, 1952 – Metal Chloride Screening Smoke Mixture
2633455 – March 31, 1953 – Smoke Generator
2688069 – August 31, 1954 – Steam Generator – Referenced in 3990987
2721495 – October 25, 1955 – Method And Apparatus For Detecting Minute Crystal Forming Particles Suspended in a Gaseous Atmosphere
2730402 – January 10, 1956 – Controllable Dispersal Device
2801322 – July 30, 1957 – Decomposition Chamber for Monopropellant Fuel – Referenced in 3990987
2881335 – April 7, 1959 – Generation of Electrical Fields
2908442 – October 13, 1959 – Method For Dispersing Natural Atmospheric Fogs And Clouds
2986360 – May 30, 1962 – Aerial Insecticide Dusting Device
2963975 – December 13, 1960 – Cloud Seeding Carbon Dioxide Bullet
3126155 – March 24, 1964 – Silver Iodide Cloud Seeding Generator – Referenced in 3990987
3127107 – March 31, 1964 – Generation of Ice-Nucleating Crystals
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
3445844 – May 20, 1969 – Trapped Electromagnetic Radiation Communications System
3456880 – July 22, 1969 – Method Of Producing Precipitation From The Atmosphere
3518670 June 30, 1970 – Artificial Ion Cloud
3534906 – October 20, 1970 – Control of Atmospheric Particles
3545677 – December 8, 1970 – Method of Cloud Seeding
3564253 – February 16, 1971 – System And Method For Irradiation Of Planet Surface Areas
3587966 – June 28, 1971 – Freezing Nucleation
3601312 – August 24, 1971 – Methods of Increasing The Likelihood oF Precipatation By The Artificial Introduction Of Sea Water Vapor Into The Atmosphere Winward Of An Air Lift Region
3608810 – September 28, 1971 – Methods of Treating Atmospheric Conditions
3608820 – September 20, 1971 – Treatment of Atmospheric Conditions by Intermittent Dispensing of Materials Therein
3613992 – October 19, 1971 – Weather Modification Method
3630950 – December 28, 1971 – Combustible Compositions For Generating Aerosols, Particularly Suitable For Cloud Modification And Weather Control And Aerosolization Process
USRE29142 – This patent is a reissue of patent US3630950 – Combustible compositions for generating aerosols, particularly suitable for cloud modification and weather control and aerosolization process
3659785 – December 8, 1971 – Weather Modification Utilizing Microencapsulated Material
3666176 – March 3, 1972 – Solar Temperature Inversion Device
3677840 – July 18, 1972 – Pyrotechnics Comprising Oxide of Silver For Weather Modification Use
3722183 – March 27, 1973 – Device For Clearing Impurities From The Atmosphere
3769107 – October 30, 1973 – Pyrotechnic Composition For Generating Lead Based Smoke
3784099 – January 8, 1974 – Air Pollution Control Method
3785557 – January 15, 1974 – Cloud Seeding System
3795626 – March 5, 1974 – Weather Modification Process
3808595 – April 30, 1974 – Chaff Dispensing System
3813875 – June 4, 1974 – Rocket Having Barium Release System to Create Ion Clouds In The Upper Atmopsphere
3835059 – September 10, 1974 – Methods of Generating Ice Nuclei Smoke Particles For Weather Modification And Apparatus Therefore
3835293 – September 10, 1974 – Electrical Heating Aparatus For Generating Super Heated Vapors – Referenced in 3990987
3877642 – April 15, 1975 – Freezing Nucleant
3882393 – May 6, 1975 – Communications System Utilizing Modulation of The Characteristic Polarization of The Ionosphere
3896993 – July 29, 1975 – Process For Local Modification of Fog And Clouds For Triggering Their Precipitation And For Hindering The Development of Hail Producing Clouds
3899129 – August 12, 1975 – Apparatus for generating ice nuclei smoke particles for weather modification
3899144 – August 12, 1975 – Powder contrail generation
3940059 – February 24, 1976 – Method For Fog Dispersion
3940060 – February 24, 1976 – Vortex Ring Generator
3990987 – November 9, 1976 – Smoke generator
3992628 – November 16, 1976 – Countermeasure system for laser radiation
3994437 – November 30, 1976 – Broadcast dissemination of trace quantities of biologically active chemicals
4042196 – August 16, 1977 – Method and apparatus for triggering a substantial change in earth characteristics and measuring earth changes
RE29,142 – February 22, 1977 – Reissue of: 03630950 – Combustible compositions for generating aerosols, particularly suitable for cloud modification and weather control and aerosolization process
4035726 – July 12, 1977 – Method of controlling and/or improving high-latitude and other communications or radio wave surveillance systems by partial control of radio wave et al
4096005 – June 20, 1978 – Pyrotechnic Cloud Seeding Composition
4129252 – December 12, 1978 – Method and apparatus for production of seeding materials
4141274 – February 27, 1979 – Weather modification automatic cartridge dispenser
4167008 – September 4, 1979 – Fluid bed chaff dispenser
4347284 – August 31, 1982 – White cover sheet material capable of reflecting ultraviolet rays
4362271 – December 7, 1982 – Procedure for the artificial modification of atmospheric precipitation as well as compounds with a dimethyl sulfoxide base for use in carrying out said procedure
4402480 – September 6, 1983 – Atmosphere modification satellite
4412654 – November 1, 1983 – Laminar microjet atomizer and method of aerial spraying of liquids
4415265 – November 15, 1983 – Method and apparatus for aerosol particle absorption spectroscopy
4470544 – September 11, 1984 – Method of and Means for weather modification
4475927 – October 9, 1984 – Bipolar Fog Abatement System
4600147 – July 15, 1986 – Liquid propane generator for cloud seeding apparatus
4633714 – January 6, 1987 – Aerosol particle charge and size analyzer
4643355 – February 17, 1987 – Method and apparatus for modification of climatic conditions
4653690 – March 31, 1987 – Method of producing cumulus clouds
4684063 – August 4, 1987 – Particulates generation and removal
4686605 – August 11, 1987 – Method and apparatus for altering a region in the earth’s atmosphere, ionosphere, and/or magnetosphere
4704942 – November 10, 1987 – Charged Aerosol
4712155 – December 8, 1987 – Method and apparatus for creating an artificial electron cyclotron heating region of plasma
4744919 – May 17, 1988 – Method of dispersing particulate aerosol tracer
4766725 – August 30, 1988 – Method of suppressing formation of contrails and solution therefor
4829838 – May 16, 1989 – Method and apparatus for the measurement of the size of particles entrained in a gas
4836086 – June 6, 1989 – Apparatus and method for the mixing and diffusion of warm and cold air for dissolving fog
4873928 – October 17, 1989 – Nuclear-sized explosions without radiation
4948257 – August 14, 1990 – Laser optical measuring device and method for stabilizing fringe pattern spacing
48050 – August 14, 1990 – Liquid atomizing a94pparatus for aerial spraying
4999637 – March 12, 1991 – Creation of artificial ionization clouds above the earth
5003186 – March 26, 1991 – Stratospheric Welsbach seeding for reduction of global warming
5005355 – April 9, 1991 – Method of suppressing formation of contrails and solution therefor
5038664 – August 13, 1991 – Method for producing a shell of relativistic particles at an altitude above the earths surface
5041760 – August 20, 1991 – Method and apparatus for generating and utilizing a compound plasma configuration
5041834 – August 20, 1991 – Artificial ionospheric mirror composed of a plasma layer which can be tilted
5056357 – October 15, 1991- Acoustic method for measuring properties of a mobile medium
5059909 – October 22, 1991 – Determination of particle size and electrical charge
5104069 – April 14, 1992 – Apparatus and method for ejecting matter from an aircraft
5110502 – May 5, 1992 – Method of suppressing formation of contrails and solution therefor
5156802 – October 20, 1992 – Inspection of fuel particles with acoustics
5174498 – December 29, 1992 – Cloud Seeding
5148173 – September 15, 1992 – Millimeter wave screening cloud and method
5245290 – September 14, 1993 – Device for determining the size and charge of colloidal particles by measuring electroacoustic effect
5286979 – February 15, 1994 – Process for absorbing ultraviolet radiation using dispersed melanin
5296910 – March 22, 1994 – Method and apparatus for particle analysis
5327222 – July 5, 1994 – Displacement information detecting apparatus
5357865 – October 25, 1994 – Method of cloud seeding
5360162 – November 1, 1994 – Method and composition for precipitation of atmospheric water
5383024 – January 17, 1995 – Optical wet steam monitor
5425413 – June 20, 1995 – Method to hinder the formation and to break-up overhead atmospheric inversions, enhance ground level air circulation and improve urban air quality
5434667 – July 18, 1995 – Characterization of particles by modulated dynamic light scattering
5441200 – August 15, 1995 – Tropical cyclone disruption
5486900 – January 23, 1996 – Measuring device for amount of charge of toner and image forming apparatus having the measuring device
5556029 – September 17, 1996 – Method of hydrometeor dissipation (clouds)
5628455 – May 13, 1997 – Method and apparatus for modification of supercooled fog
5631414 – May 20, 1997 – Method and device for remote diagnostics of ocean-atmosphere system state
5639441 – June 17, 1997 – Methods for fine particle formation
5762298 – June 9, 1998 – Use of artificial satellites in earth orbits adaptively to modify the effect that solar radiation would otherwise have on earth’s weather
5912396 – June 15, 1999 – System and method for remediation of selected atmospheric conditions
5922976 – July 13, 1999 – Method of measuring aerosol particles using automated mobility-classified aerosol detector
5949001 – September 7, 1999 – Method for aerodynamic particle size analysis
5984239 – November 16, 1999 – Weather modification by artificial satellite
6025402 – February 15, 2000 – Chemical composition for effectuating a reduction of visibility obscuration, and a detoxifixation of fumes and chemical fogs in spaces of fire origin
6030506 – February 29, 2000 – Preparation of independently generated highly reactive chemical species
6034073 – March 7, 2000 – Solvent detergent emulsions having antiviral activity
6045089 – April 4, 2000 – Solar-powered airplane
6056203 – May 2, 2000 – Method and apparatus for modifying supercooled clouds
6110590 – August 29, 2000 – Synthetically spun silk nanofibers and a process for making the same
6263744 – July 24, 2001 – Automated mobility-classified-aerosol detector
6281972 – August 28, 2001 – Method and apparatus for measuring particle-size distribution
6315213 – November 13, 2001 – Method of modifying weather
6382526 – May 7, 2002 – Process and apparatus for the production of nanofibers
6408704 – June 25, 2002 – Aerodynamic particle size analysis method and apparatus
6412416 – July 2, 2002 – Propellant-based aerosol generation devices and method
6520425 – February 18, 2003 – Process and apparatus for the production of nanofibers
6539812 – April 1, 2003 – System for measuring the flow-rate of a gas by means of ultrasound
6553849 – April 29, 2003 – Electrodynamic particle size analyzer
6569393 – May 27, 2003 – Method and device for cleaning the atmosphere