Rule 90 of the Patents Rules, 2003
Registration of title and interest in patents
Sets out how an assignee, licensee or other interest holder applies on Form 16 to have their title or interest entered in the register.
Official legal text
The verbatim statutory text of this provision is reproduced from the official source and checked by our legal reviewer before it is published here. Until that check is complete for this page, read the exact wording directly from the official source linked below — it is the only version that governs.
This explanation is written for clarity, not for citation. The official statutory text and any Gazette notification in force on your date govern, and they prevail over anything said here.
What this rule requires, step by step
Section 69 says that when a patent, or a share in it, is assigned or transmitted, or when someone becomes entitled as a mortgagee or licensee or otherwise, that person must apply to the Controller to register their title or interest. Rule 90 is the how. The application is made on Form 16 with the fee prescribed in the First Schedule.
The application must identify the patent and the parties clearly, and it must state the nature of the interest being claimed. That last point is often handled carelessly. An outright assignment, a partial assignment of a share, a mortgage, an exclusive licence and a non-exclusive licence are different things, and the register entry should reflect what the document actually does rather than what the parties casually call it.
Supporting proof of title has to come with the application. In practice this means the assignment, deed, licence or other instrument creating the interest, or a certified copy, along with evidence that the person signing had authority to sign for a company. Where a party is a company, the correct legal name and registered office should match the document. Where an inventor has assigned to a company, the chain from inventor to applicant to current owner needs to be complete without gaps.
Registration is not a formality to be done whenever convenient. Section 69 has teeth: an unregistered document is generally not admitted in evidence in any court in proof of title to a patent or to an interest in it, unless the court otherwise directs. That can be a serious problem for an exclusive licensee trying to sue, or a buyer trying to prove ownership. The safe habit is to file Form 16 as soon as the deal closes.
Why this rule matters
Assignees buying patents, companies taking assignments from founders or employees, mortgagees taking IP security, and licensees, especially exclusive licensees.
As soon as an assignment, transmission, mortgage or licence takes effect, and again on any later transfer.
A duty and a right to apply for registration of title or interest on the prescribed form with proof.
The register keeps showing the previous owner, the unregistered document may not be admitted in court to prove title, and deals and enforcement stall.
How it works in practice
A startup acquisition that nearly went wrong
Marigold Foods acquires the patent portfolio of a small Bengaluru food-processing startup, including a patent on a low-temperature drying method. The share purchase closes, the assignment deed is signed, and the team moves on to integration. Nobody files Form 16. Two years later Marigold finds a competitor copying the method and sends a legal notice. The competitor's counsel checks the register and replies that the recorded proprietor is still the startup, which no longer exists as an operating business. Marigold now has to assemble the assignment deed, board resolutions authorising the signatories, and proof of the corporate changes, then file Form 16 with the prescribed fee and answer the Controller's queries about a gap in the chain where one founder had signed on behalf of another. The registration eventually goes through, but the delay costs Marigold months of enforcement momentum and gives the competitor time to build market share.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- Applications to register title or interest under section 69 are made on Form 16 with the prescribed fee.
- The application must state precisely what kind of interest is claimed.
- Proof of title must accompany the application, including authority to sign for a company.
- The chain of title from inventor to current owner must be complete and consistent.
- An unregistered document is generally not admissible to prove title, unless the court directs otherwise.
- File promptly after closing rather than waiting for a dispute or a funding round.
Common mistakes and misunderstandings
- Thinking that signing the assignment transfers everything needed. The register does not update itself, and the entry is what third parties see.
- Describing an exclusive licence as an assignment, or the reverse, so the register entry does not match the document.
- Leaving a gap in the chain of title, for example where a company changed its name or merged, and expecting the Controller to assume the connection.
- Delaying registration until enforcement is needed, when the delay itself becomes an argument for the other side.
Connected provisions
A rule is subordinate legislation. It is made by the Central Government under a rule-making power in the Act and is amended by notification rather than by Parliament. The parent sections are listed on their own so that the source and the procedure are never confused.
Forms, deadlines and fees
The Second Schedule to the Patents Rules contains the prescribed forms. A form that has been amended will not match an older saved copy, so take a fresh download from the official site before you fill anything in.
- The Act does not set a single fixed period for applying, but registration should be sought promptly, because an unregistered document may not be admitted in court as proof of title.
Open the deadline calculator — and have every date confirmed against the current Rules before you rely on it.
This site does not carry a fee table. The First Schedule to the Patents Rules is the source, the rates vary with the applicant's category and with the mode of filing, and a figure quoted second-hand goes out of date quietly. How Indian patent fees work.
Related judgments
Court decisions shape how this provision is applied, but a summary is useful only if it is right. Every case note on this site is read by a legal reviewer before it goes live, and none has been completed for this provision so far. This section will fill in as those reviews finish. How case notes are prepared.
Questions people ask about Rule 90
Which form is used to record an assignment of an Indian patent?
Form 16 is the application for registration of a title or an interest in a patent, or of a share in it, or of any document affecting the proprietorship of a patent, under section 69. It is filed with the fee prescribed in the First Schedule, together with the assignment deed or other instrument creating the interest and proof of the signatory's authority. The same form covers mortgages, licences and other interests, so the nature of the interest must be stated clearly.
What happens if I never register an assignment?
The register continues to name the previous owner, so the world treats them as the proprietor. More seriously, section 69 provides that a document is generally not admitted in evidence in any court in proof of title to a patent or an interest in it unless it has been registered, though the court may otherwise direct. That can undermine an infringement suit or a licensing negotiation at exactly the moment when proof of ownership matters most.
Does a licensee also need to register?
A licensee who becomes entitled to an interest in a patent may apply to have that interest registered, and exclusive licensees in particular should do so, because their ability to prove their rights can be tested in litigation. Some licensees prefer not to put commercial terms on a public record. The usual compromise is to register the existence and nature of the licence with the necessary particulars while keeping the detailed commercial terms out of the material filed, subject to what the Controller requires.
What proof of title does the Controller expect?
The instrument that creates the interest, or a certified copy, plus evidence that whoever signed it had authority. For companies this usually means a board resolution or power of attorney. If there have been name changes, mergers or intermediate transfers, documents linking each step are needed so the chain runs unbroken from the recorded proprietor to the applicant. Documents in another language should be accompanied by a verified English translation.
Bought, sold or licensed a patent? Record it.
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