US PATENT SUBCLASS 369 / 109
.~.~ With diffraction (e.g., pits, grating)

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

99  DF  SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4}
100  DF  .~ Radiation beam modification of or by storage medium {20}
109.~.~ With diffraction (e.g., pits, grating)

DEFINITION

Classification: 369/109

With diffraction (e.g., pits, grating):

(under subclass 100) Subject matter wherein the radiant energy beam is deflected by the edge of an object by other than reflection or refraction.