US PATENT SUBCLASS 126 / 690
.~.~.~ Parabolic


Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

569  DF  SOLAR HEAT COLLECTOR {18}
684  DF  .~ With concentrating reflector {5}
688  DF  .~.~ Spot focus {3}
690.~.~.~ Parabolic


DEFINITION

Classification: 126/690

Parabolic:

(under subclass 688) Apparatus wherein the first surface is shaped like a plane curve generated by a point so moving that its distance from a fixed point divided by its distance from a fixed line is equal to one. [figure]