Copyright Patent

Copyright in a Patent Specification (?)

Does copyright subsist in a patent specification? The answer to this may seem obvious to most, but I did rather articulate on the obvious clearly than overlook something clearly obvious. In Catnic Components Ltd. & Anr. v. Hill and Smith Ltd. (1978), it was held by the UK High Court (Chancery Division) that copyright in a patent specification ceases to subsist upon publication of the patent application.

This UK judgment is well-known for its use of the “pith and marrow” doctrine, but its copyright angle is something I have been meaning to blog on for quite some time now.

The facts of the case are as follows:

Lintels are used to support bricks over apertures in a wall either during or after construction. These are horizontal members that are found over doors and entrances. The invention in this case is a steel lintel which is light and easy to handle as opposed to heavy ones used earlier. (picture from Catnic’s official website)

The plaintiff, the assignee of the patent over steel lintels, claimed infringement of the patent by the defendant who not only manufactured lintels identical to the one claimed in the patent (where the posterior support members extend vertically) but also produced ones whose posterior support members were inclined at 6-8 degrees from the vertical.

The defendant had obtained drawings of these lintels from the plaintiff’s employee, so in addition to the claim of patent infringement, the plaintiff also claimed infringement of copyright in the drawings, some of which were similar, if not identical, to the ones disclosed in the patent specification. The plaintiff also pointed to identical dimensions in its drawings and that of the defendant to prove copyright infringement.

To the claim of patent infringement, the defendant contended that:
1. That the posterior member in the defendant’s product was integral with the base plate, whereas the independent claim of the plaintiff’s patent required the base plate to be joined to the posterior member; and

2. That the posterior member was inclined in the defendant’s product as opposed to the requirement of a vertical posterior member in the patent. The inclined member, according to the defendant, was a technical improvement over the plaintiff’s invention.

To this the Court held that the independent claim of the patent required the posterior member to be joined to the base plate, which would include an integral connection as well.

Also, since all essential features of the patent were found in the defendant’s product, the inclined posterior member may at best save the defendant from textual infringement, but not from substantial infringement. The inclined member, according to the Court, was an immaterial variation, poorly aimed at circumventing infringement.

As for copyright infringement, the Court first broached the criterion of defendant’s access to the plaintiff’s drawings. The witness for the defendant admitted that he had perused a copy of the plaintiff’s brochure which contained the drawings of the lintels sans any dimensions. It was also admitted by the witness that the defendant’s lintel design was inspired by the plaintiff’s idea.

On the basis of these admissions, the Court held that since there was no copyright in the idea, there was no infringement of the copyright in the drawings. Further, interestingly, on comparison of the designs of the lintels, the Court held the defendant’s work to be original since there was a discernible difference in the designs (if so, how was the patent infringement claim upheld? Read the judgment of the House of Lords on appeal).

To rule out copyright infringement altogether, the Court turned to the issue of subsistence of copyright in a patent specification. The issue was framed thus:

The question is the effect, if any, of the publication of the patent drawings on the enforceability by the plaintiffs of their independent copyright in substantially identical drawings

The sum total of the Court’s ruling on this issue is as follows:
1. By giving his consent to the publication of the patent application, the patent applicant dedicates his invention to the public, subject to the grant of a patent.

2. Since one of the essential requirements of patent grant is full and proper disclosure of the best method of working the invention, illustrated if necessary by drawings, upon expiry of the patent there comes into being an implicit right to the public to use the drawings of the patent in any manner. This is naturally so, since if there is no such licence, the patentee may enforce the patent after its expiry through the copyright in the drawings, thereby extending the life of the patent.

3. However, such implicit right does not extend to any drawing which does not form part of the patent, barring drawings which are substantially similar to the ones in the patent.

4. Such right to use the drawings exists even if the patentee voluntarily allows his patent to lapse.

5. Also, if the patent is held invalid, the patentee retains his copyright in the drawings.

The logic offered by the Court is that when an applicant elects to apply for a patent grant, he makes a conscious decision to relinquish his copyright in the drawings in return for a limited yet stronger right in the form of a patent.

The question that comes to one’s mind is if the patentee loses copyright only with respect to drawings which relate to the subject-matter claimed or even those drawings which, though form part of the specification, may not necessarily relate to the specific invention being claimed?

This decision of the Chancery Division was challenged by both parties before the House of Lords. The plaintiffs appealed against rejection of the copyright claim, and the defendant against the patent claim. The House of Lords desisted from expressing a concluding view on subsistence of copyright in patent specification.

The decision of the Chancery Division was delivered prior to the UK Copyright, Designs and Patents Act 1988. Before the coming into force of this Act, the position of the law on copyright in patent specifications was as follows:

Patent specifications published before 1 August 1989-

Copyright in these belongs to the Crown but in normal circumstances no steps would be taken to enforce that copyright (notice of this was given in our Official Journal (Patents) on 25 June 1969). You would be allowed to copy these patent specifications freely but on the understanding that if the privilege is abused, for instance by copying for the purpose of selling them on, then the government may take action.

After the introduction of the 1988 Act, the position is as follows:

Patent specifications published on or after 1 August 1989-

After the Copyright Designs and Patents Act 1988 (CDPA) came into force, Copyright in patent specifications belonged to the applicant/proprietor (the Intellectual Property Office (IPO) though may copy and publish these as required by sections 16 and 24 of the Patents Act). The copying and issuing of copies to the public of patent specifications for the purposes of ‘disseminating information’ is also not an infringement of copyright. A notice of this general authorisation of such copying appeared in our Official Journal on 5 December 1990.

This means that you may freely copy UK patent specifications for the purpose of ‘disseminating the information contained in them’. If you were to copy the whole or a substantial part of the specification for any other purposes, such as marketing or sales, this could be an infringement of the copyright (unless the use fell within one of the exceptions to copyright).

If there are US or Indian decisions on similar lines or expressing a contra view, I request readers to share the details of the same with us.


  1. AvatarR S PRAVEEN RAJ

    Fundamentally, Copyright on a document is the right of the right holder to prevent others from “making copies” of his/her works for “public distribution against payment” in printed form, CD ROM etc. (Right of reproduction). Apparently, the above right doesn’t prevent individuals to make single copies of the work for private, personal and noncommercial purposes.

    Therefore a copyrighted patent specification will be dealt by academicians/researchers in the same manner as a copyrighted textbook. Of course a license on patent will have to be taken if the “patented technology” is intended to be used for commercial purposes (MAKING, USING, SELLING, Offering for SALE and IMPORTING of the product manufactured using the patented technology).

    After the expiry of patent it (specification if copyrighted) is simply equivalent to a copyrighted study material. Copyright and patent rights are mutually exclusive. Then why should the right holder relinquish one of them for the sake of the other ?

  2. AvatarJ. Sai Deepak

    Dear Mr.Praveen Raj,

    Thanks for the comment. Before I answer the specific question of relinquishment of copyrights, I would like to make a point on copyrights being negative rights. If IP rights weren’t negative rights, then the objective of their grant is not addressed, so there has to be an exclusory aspect to them. But this is common to any form of title for that matter because each right has the following components:

    1.The object/property over which the right is granted or inheres
    2.The owner of the right
    3.Persons against whom the right is available
    4.What does the right entail in the form of positive rights and their scope
    5.What triggers the sanction against infringement of the right
    6.The sanction itself

    However, what distinguishes certain IP rights is that they are solely characterised by their negative component, patent rights for instance, as evidenced by the phraseology of Section 48 of the Patents Act. But is Section 14 of the Copyright Act of the same nature? Could it be said that a copyright has both positive and negative rights in the bundle of rights which make up the copyright? If yes, is branding copyright as a purely negative right an entirely accurate proposition? I’ll leave this for you to answer.

    Moving to copyrights and patents being exclusive in nature, you have said that making of copies of the document for private, personal, non-commercial use is not infringement of the copyright. Agreed, but what about patent databases which are subscription based such as Delphion? Are these databases required to seek authorization from patentee before they make copies of the patent document available for a fee?

    Also, if 3d reproduction rights form part of the bundle of rights in a copyright and if, according to you, the copyright in the patent specification survives the expiry of the patent, does the patentee have the right to prevent others from manufacturing the invention after the expiry of the patent? What happens to the quid pro quo in the patent grant if, after the expiry of the patent, the public is prevented from using the drawings in the patent document to manufacture the product? The limited conclusion that one may still arrive is that the publication of a patent specification has the effect of limiting the term of 3d reproduction rights in the copyrighted drawings. Or going a step further, publication of the specification also has the effect of limiting the scope of the bundle of rights in the patentee’s copyright so long as the use by a third party does not constitute violation of the patent.

    Further, would it be wrong to state that post the publication of the patent, the document is a public document in the nature of a judgment? Please let us know your views on the same.


  3. AvatarAnonymous

    this is bonkers…..Do you think anywhere in the application for grant of patent you assign or license copyright in the work to the Patent Offices???? if no how come patent offices can provide copies of the same to general public that to for payment????? without paying royalties to the applicant? and require all other databases take a license from patentee????

    further if at all there can be copyright in the specification who is the author??? the inventor or the person who has drafted said specification?????….

    if an examiner require amendment to the specification….or amends the abstract on its own …can the author claim infringement of moral rights?????

    one can go on and on and make a list of such weird circumstances…

    i donno how do you read and understand judgements …but ru reading too much into it??? also please note courts do go wrong at times….


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