https://zerogeoengineering.com/2021/list-of-100-us-patents-related-to-weather-modification/
4686605 – August 11, 1987 – HAARP Patent / EASTLUND PATENT – Method and apparatus for altering a region in the earth’s atmosphere, ionosphere, and/or magnetosphere
Link in the article doesn’t work. This one does..
https://patents.google.com/patent/US4686605A/en
Abstract
A method and apparatus for altering at least one selected region which normally exists above the earth's surface. The region is excited by electron cyclotron resonance heating to thereby increase its charged particle density. In one embodiment, circularly polarized electromagnetic radiation is transmitted upward in a direction substantially parallel to and along a field line which extends through the region of plasma to be altered. The radiation is transmitted at a frequency which excites electron cyclotron resonance to heat and accelerate the charged particles. This increase in energy can cause ionization of neutral particles which are then absorbed as part of the region thereby increasing the charged particle density of the region.
Within this patent document is a section labeled Classifications:
F41H13/0043 Directed energy weapons, i.e. devices that direct a beam of high energy content toward a target for incapacitating or destroying the target
F41G7/224 Deceiving or protecting means
H01Q1/366 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor using an ionized gas
H05H1/18 Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma using externally-applied electric and magnetic fields wherein the fields oscillate at very high frequency, e.g. in the microwave range, e.g. using cyclotron resonance
Methods of weather modification/geoengineering:
