...
It is essential that users properly understand what is required to give permission for this transfer. Because the system is designed to work between pairs of Offices, which may have no other working relationship, there are steps involved, which are different from, or additional to those in other priority document exchange systems in operation between certain Offices.
| Note |
|---|
| As of February 1, 2023, there are 38 DAS participating Offices in total. |
Participating Offices:
An up-to-date list of participating Offices is maintained on the WIPO DAS website at: https://www.wipo.int/das/en/news
| Note |
|---|
| As of November 1, 2025, there are 50 IP Offices participating in WIPO DAS. |
Other Offices are at various stages of preparation to join the system and are expected to join in the future.
| Note |
|---|
| The participating Office’s websites also provide useful DAS information relevant to that particular Office, please see New Office Participation |
Documents Which Can Be Made Available:
...
The scope of documents which can be made available also depends on the policy of the Office of First Filing.
Some Offices will allow any patent application filed at their Office to be entered into the system; other Offices offer the service only for a limited range of applications, such as those which have been filed in electronic form.
...
The Help Desk is closed on Saturdays and Sundays, as well as on non-working days at WIPO which are listed at: https://www.wipo.int/contact/en/holidays.html
...