US PATENT SUBCLASS 434 / 223
.~.~ Visual signalling


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



434 /   HD   EDUCATION AND DEMONSTRATION

219  DF  OCCUPATION {8}
222  DF  .~ Code communication {1}
223.~.~ Visual signalling


DEFINITION

Classification: 434/223

Visual signalling:

(under subclass 222) Subject matter relating to a system such as semaphore using signals that can be seen.