Search found 3 matches

by clem stern
Tue Feb 05, 2019 4:52 pm
Forum: PATSTAT Product Line
Topic: missing prior_appln_id
Replies: 5
Views: 5884

Re: missing prior_appln_id

Thank you for this document which is loaded with useful insight for my research. I only use Docdb family size as a proxy to measure those patents families size since I can't group them using priorities, but I'm not trying to replicate the process of DocDB. The main idea was that if most of those pat...
by clem stern
Wed Jan 30, 2019 1:16 pm
Forum: PATSTAT Product Line
Topic: missing prior_appln_id
Replies: 5
Views: 5884

Re: missing prior_appln_id

Hello, thank you for your respons. I'm using Patstat Online Autumn 2018. I'm using a code similarn to this : SELECT distinct t201.appln_id from TLS201_Appln as t201 inner join tls209_appln_ipc as t209 on t201.appln_id= t209.appln_id WHERE ( t209.ipc_class_symbol LIKE 'A45D%') Which gave me 191 896 r...
by clem stern
Tue Jan 15, 2019 4:11 pm
Forum: PATSTAT Product Line
Topic: missing prior_appln_id
Replies: 5
Views: 5884

missing prior_appln_id

Hello, I'm using the equivalent family definition based on priority to group patents and compute statistics. I have noticed that an important amount of patent (mostly asian from Japan, China and Korea) don't have any prior_appln_id in the tab tls204. Most of them are mono patent family in the Docdb ...