Schedule 1, paragraph 4(3)
PA 1977
Patents Act 1977 · United Kingdom
Where the term of a new existing patent is extended by this paragraph and any government department or any person authorised by a government department— any such use of the invention by any government department or person so authorised, after the end of that year, may be made free of any payment to the proprietor of the patent. has before the appointed day, used the invention in question for the services of the Crown; and continues to so use it until the end of the sixteenth year from the date of the patent,
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Source: legislation.gov.uk · retrieved 2026-09-04