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by varispeed 337 days ago
https://ppubs.uspto.gov/pubwebapp/static/pages/ppubsbasic.ht...

Have a look. For instance in the search box enter "categories".
1 comments
dotancohen 337 days ago 

  > Search results
  > Results for query "(Categories).pn."

  > No records found
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varispeed 337 days ago
I am sorry for not being precise. You should enter "Categories" in "For" input. (in the "Or" section)
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