Relative terms like 'close proximity' in patent claims are assessed by reference to the overall product described in the claim, not by reference to a sub-component, and the same word may bear different meanings in different contexts within a single patent specification.
The full text is available to signed-in members, including the 6 later cases that cite this judgment.
2 of the 6 citing cases carry a classified treatment. How each court treated it is available to signed-in members.