Interpretation of IPCR results

This space is made available to users of Open Patent Services (OPS) web-service and now also to users of EPO’s bulk data subscription products such as 14. EPO worldwide bibliographic database (DOCDB), 14.11 EPO worldwide legal status database (INPADOC), 14.12 EP full text data, 14.1 EP bibliographic data (EBD)and more.

Users can ask each other questions, exchange experiences and solutions, post ideas. The moderator will use this space to announce changes or other relevant information.
Post Reply

Posts: 19
Joined: Sun Dec 11, 2005 3:28 pm
Location: Torino (Italy)

Interpretation of IPCR results

Post by Alberto231 » Thu Feb 16, 2017 3:26 pm

When accessing IPCR of a specific patent through OPS, I find for example such a kind of result

IPCR: G01V 15/ 00 (G01V 15/ 00 A I); G07C 9/ 00 (G07C 9/ 00 A I); H04M 11/ 04 (H04M 11/ 04 A I)

Hence, using this as a practical example, my question is:

a) which is /are the core invention class(es)
b) which is /are the advanced invention class(es)
c) which is /are the core additional class(es)
d) which is /are the advanced additional class (es)

My guess is that these classifications are related to the parenthesis and to the A I annotation.

Thank you and best regards

EPO / OPS Support
Posts: 1039
Joined: Thu Feb 22, 2007 5:32 pm

Re: Interpretation of IPCR results

Post by EPO / OPS Support » Tue Feb 21, 2017 8:18 am


On OPS webpage there is a section called Further information where among other things you will also find schema where you will find description of A and I: ... .html#tab3

As you can see from the WIPO St 8 ( ... -08-01.pdf) , position 28 relates to the classification level “the A stands for classification in the full IPC”. Position 30 relates to classification value, “I = invention, N=non invention”

Please consider that, as reported on page 3 of the St. 8, “As of January 1, 2011, the previous designations for classification level indicators C (Core), A (Advance) and S (Subclass) are not applicable.” Instead the notion of “full IPC” or “main groups only” applies.

OPS support

Post Reply