This is one of my own patents so I know it well.

http://www.patentsview.org/api/patents/query?q={"patent_number":"9029680"}&f=["patent_number","patent_title","assignee_organization"]

It returns:

{"patents":[{"patent_number":"9029680","patent_title":"Integration of a photovoltaic device","assignees":[{"assignee_organization":"Analog Devices, Inc.","assignee_key_id":"57922"}]}],"count":1,"total_patent_count":1}

The organization name is WRONG it should be Alta Devices.

I have downloaded the assignee.tsv file and Alta Devices is not in the file.  If I do a search on the USPTO I see 66 patents issued.

Something is amiss.

Andy