When drafting patent applications, can we skip certain numbers from the SEQ ID NOs? (This is just for convenience, so that I don't have to go back and renumber everything.) for US/PCT/worldwide, generally.

Thank you!

  • Are you referring to figure numbers or references numbers to specific items within a figure ?
    – George White
    Oct 22, 2021 at 20:12

1 Answer 1


If you are talking about reference numbers there is no requirement for monotonically increasing values. Often you will see ref. numbers that are not numbers- like 100B. Some people who like numbers in order to make it easier to find when looking at a paper version rather than a machine readable version sometimes skip numbers and only use odd numbers, for example, so they can insert even numbers if needed and preserve the sequence.

  • 1
    I believe it refers to sequence listings. I know nothing about them. Not sure if the PCT documentation could be helpful. Oct 27, 2021 at 12:44
  • If that is the question i also have no background to answer.
    – George White
    Oct 27, 2021 at 16:14

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