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Classes 320 - 355

Class Date Established
320 1943
322 1947
323 1947
324 1953
326 1994
327 1994
329 1960
330 1959
331 1959
332 1948
333 1953
334 1961
335 1966
336 1952
337 1968
338 1959
340 1910
341 1988
342 1986
343 1947
345 1993
346 1947
347 1994
348 1994
349 1996
351 1964
352 1964
353 1968
355 1968
United States Patent and Trademark Office
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Last Modified: 7/1/2010 9:27:38 AM