T 1127/16 (Aircraft communication method/BOEING) vom 18.02.2021

Added subject-matter - main, 1st and 4th to 13th auxiliary requests (yes): unallowable limitation
Extension of protection conferred - 2nd and 3rd auxiliary requests (yes): "inescapable trap"
Referral to the Enlarged Board - inescapable trap (no): not required and no divergence

(1) With respect to the assessment of compliance with Article 123(2) EPC, the fact that a claim of a patent is to be construed by a mind willing to understand and not a mind desirous of misunderstanding does not mean that the description and the drawings have automatically to be consulted when an "ambiguous" feature (i.e. a feature which at least theoretically allows more than one interpretation) occurs in the claim, or where the claim as a whole includes one or more inconsistencies, to resolve that ambiguity or inconsistency. Rather, the claim should essentially be read and interpreted on its own merits (see points 2.6.1 and 2.6.2 of the Reasons).
(2) As to the issue of an "inescapable trap", see point 4 of the Reasons.