The use of the Ilford trademark was acquired by Harman as part of the 2005 receivership of the old Ilford Imaging group.
From Ilford/Harman's website:
"ILFORD PHOTO has experienced a tumultuous history since its origins in 1879, with ownership of the company changing hands several times. The latest development was the acquisition in February 2005 of its black-and-white photographic business, premises and ILFORD PHOTO name from the receivers of the old ILFORD Imaging group by HARMAN technology Limited, a company created by former managers of the company and named after the founder of the ILFORD business, Alfred Harman."
We may be talking about semantics here. If the acquisition of the trademark was an acquisition of a permanent, irrevocable license, whether or not the Swiss organization holds any residuary rights is probably moot. And now that Ilford Imaging Switzerland GmbH is in bankruptcy (or equivalent) it may be even more moot.