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Classes 427 - 473

Class Date Established
427 1975
428 1975
429 1976
430 1979
431 1968
432 1972
433 1979
434 1980
435 1979
436 1982
438 1997
439 1987
440 1980
441 1982
442 1997
445 1983
446 1984
449 1988
450 1987
451 1994
452 1990
453 1987
454 1991
455 1980
460 1989
462 1991
463 1996
464 1982
470 1992
472 1992
473 1993
United States Patent and Trademark Office
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Last Modified: 7/1/2010 9:27:40 AM