US PATENT SUBCLASS 359 / 797
.~.~ Three or more elements

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
796  DF  .~ Single component with multiple elements {1}
797.~.~ Three or more elements

DEFINITION

Classification: 359/797

Three or more elements:

(under subclass 796) Subject matter wherein the single

component of the lens is made up of three or more masses of refractive material; each having two opposed refracting surfaces, which surfaces are disposed transversely of the optical axis of the lens and spaced therealong.