Hey, Can you tell me please why sometimes I find same applicant name and adress but different PSN_ID. Does it mean that it's not the same applicant? if it's the same applicant how can I deal with that when I count patents by applicant. Exemple 7022504 ESSILOR INTERNATIONAL Compagnie Générale d'Optiq...

Hi,
Thank you for your helpful answer.

Best regards

Hey,
Can you tell me please if it is correct to put in my query: left (cpc_class_symbol,4) in ('y02B', 'y02c', 'y02e').
I would like to obtain all the patents with these CPC codes and all subcodes.
what is the difference if i put cpc_class_symbol in ('y02B', 'y02c', 'y02e')

Thank you from advance

Hey,
Thank you for your answer. I'm not looking for inventors, I need applicants (firms).
I tried to put [FR] in the field demandeurs but i generally get the inventor too.

best regards

Hey Can you help me with this query please? How to get the patent count (in the technological field with CPC code Y02E 10/70) for each French companies? It is not appropriate in my study to use appln_Auth='FR' in the query, to select french firms I want to use applicant (not inventor) country code, ...