534. Indirect infringement.

534.     Indirect infringement.

A person, other than the proprietor of the patent, infringes1 a patent for an invention if, while the patent is in force2 and without the proprietors consent, he supplies or offers to supply in the United Kingdom a person other than a licensee or other person entitled to work the invention3 with any of the means, relating to an essential element of the invention, for putting the invention into effect when he knows, or it is obvious to a reasonable person in the circumstances, that those means are suitable for putting, and