Section 78 of the Patents Act, 1970
Power of Controller to correct clerical errors, etc.
Lets the Controller correct clerical errors in a patent, an application, related documents or the register, on request and with safeguards.
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 is a simplified explanation. Where it differs from the official text of the provision, or from an applicable Gazette notification, the official text and the notification prevail.
What this section says, in plain language
Typing errors happen. A patentee's name is misspelt, an address carries a wrong pin code, a priority date is entered with the digits transposed, or a figure reference in the specification is wrong. Section 78 lets the Controller correct clerical errors in a patent, in an application for a patent, in any document filed in pursuance of an application, or in the register, without anyone having to go to court.
The correction is made on a written request accompanied by the fee prescribed in the First Schedule, and where no special form is prescribed the general purpose form is used. Rules 122 to 125 fill in the procedure. The Controller may require notice of the proposed correction to be advertised, so that anyone who might be affected can object, and any interested person may oppose within the period the Rules allow. Once settled, the correction is notified and the record updated.
The safeguard matters because corrections can move value. A change to a date, an applicant name or a claim reference can affect priority, ownership or scope. So the Controller looks at whether the mistake really is clerical - something that slipped in during transcription or typing - rather than a change of mind about what the invention is or who owns it. The Controller will refuse where the request would in substance amend the specification.
That is where section 57 takes over. An applicant or patentee who wants to change the description or claims applies to amend, and the amendment is tested against the limits in section 59, which broadly prevent widening the scope or introducing matter that was not disclosed. Choosing the correction route to smuggle in an amendment does not work, and it wastes time. The rule of thumb: if the reader would say the document always meant to say X and merely mistyped it, correction fits; if the document would now mean something different, you need an amendment.
Why this section matters
Applicants and patentees with errors in filed documents, and anyone relying on register entries that are factually wrong.
As soon as an error is spotted, whether during prosecution or years after grant.
A power in the Controller to correct clerical errors, with advertisement and opposition safeguards where third parties could be affected.
An uncorrected error can break the chain of title, cast doubt on priority, or give a defendant an easy technical argument in an infringement action.
How it works in practice
A transposed priority date on a granted patent
Kestrel Robotics Pvt Ltd, Pune, files a convention application claiming priority from an earlier filing made on 09 March. The Indian filing records the priority date as 03 September because the digits were transposed while the forms were being prepared. Nobody notices until, five years after grant, Kestrel writes to a Coimbatore machine builder alleging infringement, and the builder's adviser points out that a trade journal article published in June sits between the two dates and would be prior art on the recorded date. Kestrel applies to the Controller to correct the clerical error, producing the certified priority document, the original instructions to its agent and the transmittal record, all of which show the correct date. The Controller is satisfied that this is a transcription slip and not a change of position, has the proposed correction advertised, receives no opposition within the period allowed, and orders the correction. The register and the patent are updated, and the June article ceases to be a problem.
Simplified illustration only. Actual legal outcomes depend on the facts.
Key points to remember
- The power covers clerical errors in a patent, an application, documents filed with it, and the register.
- A written request with the prescribed fee starts the process; the general purpose form is used where no special form applies.
- The Controller may advertise the proposed correction so that interested persons can oppose.
- Opposition, where allowed, must be filed within the period fixed by the Rules.
- A correction cannot be used to change what the specification actually says or claims.
- Substantive changes belong in an amendment application under section 57, tested against section 59.
Common mistakes and misunderstandings
- Trying to broaden or rescue a claim through a correction request. The Controller will treat it as an amendment and refuse.
- Waiting until enforcement to fix an obvious error. Corrections attract far less suspicion when they are made long before any dispute.
- Sending an informal email pointing out the mistake. The section calls for a written request with the prescribed fee, and the office needs the supporting proof.
Connected provisions
Indian patent law works in two layers. The Act carries the substance and the Rules carry the machinery. Because the layers are amended by different processes and at different times, they are presented in separate blocks instead of being merged into one description.
Forms, deadlines and fees
Prescribed forms sit in the Second Schedule to the Patents Rules. The Schedule is updated along with the Rules, so the safe practice is to download the form on the day you prepare it and check that it is the current version.
- There is no time limit for asking for a correction; it can be sought during prosecution or after grant.
- Where the proposed correction is advertised, any opposition must be filed within the period fixed by Rule 124 - check the current Rules for that period.
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
No judgment summaries appear here yet. Our process requires a legal review of each case note before publication, covering the citation, the court and the point actually decided. Until a note for this provision has passed that check, the section stays empty rather than carrying unverified material. How case notes are prepared.
Questions people ask about Section 78
What counts as a clerical error?
A mistake made in writing, typing or transcribing something, where the intended content is clear from the surrounding material. Misspelt names, wrong addresses, transposed digits in a date, an incorrect application number, a mislabelled figure reference or a repeated paragraph are typical. What does not count is a change of substance dressed as a slip, such as swapping a chemical for a different one, adding a feature that was never described, or replacing the applicant with a different entity.
Can I correct the name of the applicant?
A misspelling or a change in the same entity's legal name can normally be corrected, with proof such as an incorporation certificate or a name change certificate. Substituting a different legal entity is not a correction, because it changes who owns the application. That is dealt with either through the procedure for a change of applicant during prosecution, or by an assignment recorded on the register after grant.
Will my correction be published?
The Controller may require the proposed correction to be advertised where third party interests could be affected, particularly after publication or grant. That advertisement is what makes the opposition safeguard meaningful. Corrections of purely internal slips before publication are usually handled without advertisement. Either way the final position is recorded, so the file and the register show what was corrected, when it was corrected and on whose request.
Can someone else ask for my document to be corrected?
The request normally comes from the person who filed the document or from the patentee. A third party who believes the register is wrong in a substantive way has a different remedy: rectification by the High Court under section 71. A third party can, however, oppose a correction that has been advertised, if that correction would damage their position. That is precisely why the Controller advertises corrections which could shift a date, a name or the meaning of a claim after publication.
Spotted a mistake in your patent documents?
MYCrave Consultancy prepares clerical error requests, assembles the supporting proof and advises when an amendment is needed instead.
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