What is the cross-reference requirement for multiple reissue applications?

When multiple reissue applications are filed for a single patent, each application must include a cross-reference to the other related reissue applications. The MPEP states:

37 CFR 1.177(a) requires that all multiple reissue applications resulting from a single patent must include as the first sentence of their respective specifications a cross reference to the other reissue application(s).

This cross-reference should provide notice of the multiple reissue applications and identify their relationships. An example of the required language is:

Notice: More than one reissue application has been filed for the reissue of Patent No. 99,999,999. The reissue applications are application numbers 99/999,994 (the present application), 99/999,995, and 99/999,998, all of which are divisional reissues of Patent No. 99,999,999.

This requirement ensures transparency and proper identification of related reissue applications.

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Tags: cross-reference, multiple reissue applications, specification requirements