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4 posts
alice
Last seen: 04/13/2018 - 14:01
Joined: 04/02/2018 - 03:28
first inventor country and ipc subclass

Hi, I have trouble to get data by the first inventor country. I get a mix of nationalities. It seems that the problem appears only with certain countries. I have also tried to filter further my data set by some ipc subclasses that I need for my research. I can get data only for classes (G, H etc.), but not subclasses. Example of my query:

http://www.patentsview.org/api/patents/query?q={"_and":[{"patent_firstnamed_inventor_country":"CN"},{"ipc_subclass":"G08C"}]}&f=["assignee_country","assignee_organization","patent_date","patent_num_claims","patent_num_combined_citations","coinventor_country","patent_title"]&o={"matched_subentities_only":true}

Thank you very much for your help!

 


 

Thu, 04/05/2018 - 10:52
PVTeam
Role: moderator
Last seen: 09/10/2024 - 13:29
Joined: 10/17/2017 - 10:47
RE: FIRST INVENTOR COUNTRY AND IPC SUBCLASS

Hello,

Thanks for reaching out! There are two separate issues going on here:

First, in our data the subclass identifier is only the last piece of the IPC identifier you provided (ie the 'C') and you can't search for the full subclass 'G08C'. Instead you would need to search for section 'G', class' 08', subclass 'C'. Hopefully that will help you get the results you are looking for! There is documentation on this here: http://www.patentsview.org/api/patent.html#field_list.

Second, I notice that in your field list you are returning coinventor_country (rather than first named inventor country). So it is certainly possible that you are in fact finding patents with a first named inventor from China but that their coinventors are from other countries as well. I would recommend adding first named inventor country to your return field list!

Hope this helps,

PVTeam

Sun, 04/08/2018 - 16:46
alice
Last seen: 04/13/2018 - 14:01
Joined: 04/02/2018 - 03:28
FIRST INVENTOR COUNTRY AND IPC SUBCLASS

Thank you for your reply and explanation of IPC identifiers. It makes much more sense now :-) Regarding the inventor country, I think that the problem is a bit more complicated. I have run more searches including your suggestions above, and it seems that your inventor country is defined differently in comparison to uspto search here: http://patft.uspto.gov/netahtml/PTO/search-bool.html. In many cases the inventor country in uspto is "inventor_lastknown_country" in the api. However, there are cases when api search results do not match uspto results in that category. 

For example: {"q":{"_eq":{"patent_number":"3931120"}},"f":["patent_number","patent_date","patent_title","app_country","assignee_country","forprior_country","inventor_country","inventor_first_name","inventor_last_name","inventor_city","inventor_lastknown_city","inventor_lastknown_country","patent_firstnamed_inventor_country","patent_firstnamed_assignee_country"]}

The inventor country of the first inventor on the list is CN in that case (both inventor country and inventor last known country), but it is JA in uspto search (and also the inventor city is completely different). Could you please tell me more about how is the category of the inventor country defined in your api? It seems that the uspto public search does not show information that you have in your api.

Thank you for further clarification.

Thu, 04/26/2018 - 19:02
PVTeam
Role: moderator
Last seen: 09/10/2024 - 13:29
Joined: 10/17/2017 - 10:47
RE: FIRST INVENTOR COUNTRY AND IPC SUBCLASS

Hello,

Upon further investigation of the issue you encountered, we have determined that this is a known bug, and we are currently working on implementing an updated algorithm.

Thanks,

PVTeam