Search found 3 matches
- Tue Feb 05, 2019 4:52 pm
- Forum: PATSTAT Product Line
- Topic: missing prior_appln_id
- Replies: 5
- Views: 6436
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...
- Wed Jan 30, 2019 1:16 pm
- Forum: PATSTAT Product Line
- Topic: missing prior_appln_id
- Replies: 5
- Views: 6436
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...
- Tue Jan 15, 2019 4:11 pm
- Forum: PATSTAT Product Line
- Topic: missing prior_appln_id
- Replies: 5
- Views: 6436
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 ...