FAQs Patent Questions

Question:You can find a list of PTDL libraries on the official Gazette and on the USPTO Web site.

Answer:
A list of PTDL libraries can be found in the Official Gazette and on the USPTO Web site.

Question:What is the Official Gazette?

Answer:
The Official Gazette of the United States Patent and Trademark Office for Patents (OG) is issued every Tuesday and summarizes that week's patented inventions.

Question:How do I search for a particular type of patent, e.g., a design patent?

Answer:
To search for a particular type of patent, go to any one of the three search pages (Quick, Advanced, Number) and, in the appropriate patent number field (Patent Number, PN/, Query), enter the patent number including the appropriate prefix: 'D' for design patents, 'PP' for plant patents, 'R' for reissue patents, 'T' for defensive publications, 'H' for SIRs, 'X' for X patents, or 'AI' for Additional Improvements

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