Section 57(3)

Where an exclusive licence granted otherwise than for royalties or other benefits determined by reference to the working of the invention is in force under the patent or application concerned, then— in relation to anything done in respect of the invention which, but for the provisions of this section and section 55 above, would constitute an infringement of the rights of the licensee, subsection (4) of that section shall have effect as if for the reference to the proprietor of the patent there were substituted a reference to the licensee; and in relation to anything done in respect of the invention by the licensee by virtue of an authority given under that section, that section shall have effect as if the said subsection (4) were omitted.

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Source: legislation.gov.uk · retrieved 2026-09-04