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Classes 388 - 426

Class  Date Established
388 1989
389 1990
392 1990
395 1991
396 1996
398 2003
399 1996
400 1978
401 1967
402 1969
403 1973
404 1972
405 1978
406 1979
407 1977
408 1971
409 1979
410 1979
411 1981
412 1982
413 1982
414 1979
415 1969
416 1969
417 1970
418 1970
419 1982
420 1982
422 1978
423 1972
424 1968
425 1971
426 1973
United States Patent and Trademark Office
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Last Modified: 7/1/2010 9:27:39 AM