Forum de discussion

Utilisez notre forum pour vous entretenir avec des experts de l'OEB et avec d'autres utilisateurs.

Visitez le forum consacré aux services d'information brevets asiatique

Are you familiar with Y02/Y04S?

If you are a user of the Y02/Y04S classification scheme for climate change mitigation technologies, we invite you to participate in a short survey. It will only take a few minutes of your time and your answers will help us to improve the scheme further.
You can complete the survey in English, German or French language

Take the survey


Système de numérotation - Inde

Désolé. Actuellement, cette page n'existe pas en français.


18 month publication

  • publication of application
  • pre-grant opposition
  • WIPO code: A

Publication of specification

  • post-grant opposition (>2005)
  • WIPO code: A1

Patent of addition

  • published with a new number
  • WIPO code: A7, DocDB code: E


nnnnn/LLL/yyyy    application numbers (> 1972)

  • five digits for the serial number (n)
  • three digits for the filing office/city code (L)
  • four digits for the year (y)

(nnnnn/LLLNP*/yyyy  PCT application numbers >2003)

(IN/PCT/yyyy/nnnnn/LLL   PCT application numbers < 2003)

* NP for national phase

Filing offices (LLL) 
Kolkata (formerly Calcutta)   = KOL (CAL) 
Mumbai (formerly Bombay)  = MUM (BOM)  
Chennai (formerly Madras)   = CHE (MAS)  
Delhi   = DEL  

nnnnnn    publication numbers (> 1912)

  • up to six digits for the serial number (n)
  • no city code
  • no year

Quick Navigation