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Classes 246 - 291

Class Date Established
246 1918
248 1935
249 1965
250 1912
251 1954
252 1940
254 1914
256 1913
257 1992
258 1913
260 1938
261 1916
264 1963
266 1915
267 1919
269 1961
270 1916
271 1916
273 1924
276 1916
277 1962
278 1920
279 1918
280 1919
281 1918
283 1918
285 1956
289 1918
290 1918
291 1918
United States Patent and Trademark Office
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Last Modified: 7/1/2010 9:27:36 AM