US PATENT SUBCLASS 246 / 473.3
.~ Light beam projecting

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

473 R  DF  SIGNALS {12}
473.3.~ Light beam projecting

DEFINITION

Classification: 246/473.3

Light beam projecting:

(under subclass 473) Subject matter including devices which give an indication by means of a projected beam of light.