US PATENT SUBCLASS 216 / 5
.~ Sign or material is electroluminescent

Current as of: June, 1999
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216 /   HD   ETCHING A SUBSTRATE: PROCESSES

4  DF  FORMING OR TREATING A SIGN OR MATERIAL USEFUL IN A SIGN {1}
5.~ Sign or material is electroluminescent

DEFINITION

Classification: 216/5

Sign or material is electroluminescent:

(under subclass 4) Process wherein the sign or material adiabatically emits light in an electric field.