Patent Searching Before Filing in Vietnam: Why and How

Before filing a patent application in Vietnam, it is prudent to search existing prior art — earlier patents, published applications, and other public disclosures. Because novelty is assessed against everything disclosed anywhere in the world before the filing or priority date, a search helps an applicant understand whether a technical solution is likely to be new and inventive before committing to the cost of filing and examination.

Why search first

Assessing patentability — a search indicates whether the invention meets novelty and inventive-step requirements.
Avoiding wasted cost — identifying blocking prior art early avoids fees on an application likely to be refused.
Freedom to operate — a search can reveal third-party rights that a new product might infringe.
Drafting strategy — knowing the closest prior art helps frame claims to distinguish the invention.

Where and how to search

Searches typically combine the Vietnamese national database with international sources, since worldwide disclosures are relevant to novelty. Useful resources include the national IP office database and free international tools that aggregate patent publications across jurisdictions. A search usually looks at:

Keywords describing the technical problem and solution.
Relevant International Patent Classification (IPC) codes to target the correct technical field.
Names of key competitors or inventors active in the field.

Limitations of a search

No search is exhaustive. Recently filed applications may not yet be published, and disclosures can appear in non-patent literature that is harder to find. A negative search result reduces risk but does not guarantee that a patent will be granted or that no prior art exists.

Frequently asked questions

Is a search mandatory before filing?

No, a search is not legally required. It is a risk-management step that many applicants take voluntarily before investing in an application.

Can I rely entirely on a search result?

No. A search reduces uncertainty but cannot capture unpublished applications or every disclosure, so it is not a guarantee of grant.

Does a search protect my invention?

No. Searching provides information only; protection comes from filing an application. Also avoid public disclosure before filing, as it can destroy novelty.

How LTV Law helps

LTV Law conducts prior-art and freedom-to-operate searches, interprets the results, and advises on filing strategy in Vietnam — contact our team.

This article is for general information only and does not constitute legal advice.