United States Patent 4,686,605 Eastlund August 11, 1987 -------------------------------------------------------------------------------- Method and apparatus for altering a region in the earth's atmosphere, ionosphere, and/or magnetosphere <A HREF="http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1='4,686,605'.WKU.&OS=PN/4,686,605&RS=PN/4,686,605" target="_new">http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/neta...</A>