How to Download Chinese and Korean Patent PDFs: CNIPA, KIPRIS, and Design Applications
Checked: 2026-09-22. For number notation, application/publication identity, and kind codes, start with Patent number examples and kind codes; this article focuses on obtaining the right document.
The short answer: confirm the document first, then open it
A Chinese or Korean number does not always lead straight to a PDF. Confirm the document identity first: publication, grant or application, and the kind code. Then open the document in an official service.
CNIPA and KIPRIS are the official services for these documents. CNIPA's publication system is the place to check the Chinese official publication and drawings. KIPRIS is useful for Korean records, `KPA` English abstracts, and the translation controls exposed on a record. A CAPTCHA, a login or session issue, or a manual PDF download belongs to that site's own workflow.
A bibliographic search result, from any service, is not a specification PDF: it confirms which document you have, not that its full text is available.
Chinese applications: do not manufacture a design publication number
The dangerous example is `CN202330520742.7`. Its shape is a Chinese design application number: the type digit is `3`, and the check digit belongs to the application identifier. It is not safe to change it to `CN202330520742A` and hope that a publication exists. DownloadPatent deliberately keeps it as a design application instead of treating it as a normal `A` publication.
For a Chinese design application, the resolution path is:
1. Keep the application number and look it up as an application, not as a publication. 2. Accept a candidate only when the returned record confirms that it is a design record. 3. Use the returned publication number for document retrieval; do not invent the kind code.
Classification is therefore asymmetric. When a CN or KR number is already clearly an invention, it can be looked up directly as a publication. A design-shaped reference needs a confirmed design record first; without one, the reference stays unresolved. `CN202330520742.7` is an application-resolution example, not permission to assert an `A` publication number.
For an ordinary Chinese invention publication such as `CN104704658A`, the normal publication route can be tried. CN kind fallback is bounded to `A`, `B`, `U`, and `Y` when the source's kind does not match. That fallback is a way to test known alternate document kinds; it is not a reason to turn a design application into an invention publication.
Korean records and the four different meanings of “English”
KIPRIS creates a practical language trap. Keep these four artifacts in separate file or citation fields:
| Label | What it is | Is it the Korean original PDF? |
|---|---|---|
| `KPA` | Korean Patent Abstracts, an English abstract record | No |
| `한→영기계번역` | A machine translation offered by the KIPRIS record, when available | No |
| English family publication | A separately published WO, EP, US, or other family member | No; it has its own publication identity |
| Korean original PDF | The Korean office document, claims, description, and drawings | Yes |
KIPRIS help identifies `KPA` as an English abstract database, not a universal English full specification. Its record-level Korean-to-English machine translation can be available for some patent, utility-model, foreign, or design material, but availability is record-dependent; some specifications cannot be translated, and the service may ask for a CAPTCHA. A machine translation is a reading aid, not a professional translation and not an English publication.
An English family publication is a different legal document. Check the priority and family relationship in Espacenet, then record its own publication number, date, kind, and claims. It may be the most useful English reading source for a US or EP file, but it must not be renamed as the Korean original. Conversely, an English abstract or machine translation cannot substitute for the Korean PDF when the task is to inspect the as-published Korean claims or drawings.
DownloadPatent does not download KIPRIS machine translations. Use KIPRIS manually when its Korean record or translation is the evidence you need.
Manual workflow when you are not using DownloadPatent
For a Taiwanese, US, or EP office workflow, the most reproducible manual sequence is:
1. Preserve the number exactly as received and identify whether it is an application, publication, or grant. Use the number guide linked above instead of guessing from the digit count. 2. Search the exact publication in Google Patents. If the page has a PDF link, download it and confirm the first page contains the expected office, number, title, and kind. 3. If Google Patents has no PDF link, search the normalized publication in Espacenet and open the full document; a bibliographic family page alone is not a PDF. 4. For a CN design application, look up the application number in Taiwan GPSS and wait for a result confirmed as a design. Copy the returned publication number; never create an `A` or `S` suffix yourself. 5. For a Korean record, use KIPRIS to inspect the Korean original and separately note whether `KPA`, `한→영기계번역`, or an English family member is available. 6. Save the source URL, the exact identifier used, the retrieved bytes, and the document language. If the source only returns bibliographic data, preserve that result and mark the PDF as unavailable rather than replacing it with an unrelated family member.
Failure diagnosis: absent document versus temporary service failure
Several failures look similar in a browser:
- Google Patents can show a valid page without a PDF link; that means this source has no PDF, not that CNIPA or the patent is absent.
- OPS/Espacenet can offer no full document, zero pages, or a failed page request. A family or bibliographic record is not proof that the PDF is available.
- GPSS can report an unsuccessful lookup, return an unrelated record, offer no matching document, or return a file that is not a usable PDF. A lost GPSS session is a retrieval problem, not proof that the publication does not exist.
- Check every downloaded file: reject HTML error pages, truncated files and files whose content or document number does not match. A successful HTTP response is not enough.
- CN and KR alternate-kind probing may recover a valid `A`, `B`, `U`, or `Y`/`B1` document when the requested kind is wrong. It still cannot recover a publication that the office never issued.
Most importantly, a server error or timeout from any of these services does not prove that the document is missing. Treat it as a temporary service failure, not as “no such document”: retry later or use the official source before closing the case. DownloadPatent works the same way, and reports a file that fails its checks as unusable rather than keeping it silently.
The practical rule for `中國專利 下載` and Korean equivalents is therefore: resolve the document identity first, keep design applications fail-closed, separate Korean-language and English-language artifacts, and diagnose each service independently. DownloadPatent can collect the documents at the end of the workflow, but the method and the evidence remain valid without the tool.