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Classes 474 - 532

Class Date Established
474 1980
475 1990
476 1993
477 1994
482 1992
483 1992
492 1993
493 1980
494 1982
501 1981
502 1983
503 1987
504 1993
505 1988
506 2007
507 1991
508 1996
510 1996
512 1987
514 1985
516 1998
518 1981
520 1982
521 1978
522 1986
523 1982
524 1982
525 1979
526 1976
527 1982
528 1976
530 1984
532 1984
United States Patent and Trademark Office
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Last Modified: 7/1/2010 9:27:41 AM