US PATENT SUBCLASS 257 / 196
.~ Both semiconductors of the heterojunction are the same conductivity type (i.e., either N or P)

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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

183  DF  HETEROJUNCTION DEVICE {10}
196.~ Both semiconductors of the heterojunction are the same conductivity type (i.e., either N or P)

DEFINITION

Classification: 257/196

Both semiconductors of the heterojunction are the same conductivity type (i.e., either n or p):

(under subclass 183) Subject matter wherein the semiconductor materials which define the heterojunction are of the same conductivity type (e.g., both p or both n).