Who owns this patent?

Following other previous posts, I return on the issue of ownership changes in Patstat.

The goal is to understand what applicant is available, given a change of ownership. I'll refer from here onward only to EPO patents.
We may find such applications when looking into inpadoc legal data (TLS221 prs_code="RAP1" or prs_code="RAP2") .

I'll make also use of table tls227_pers_publn cause I expect we may have changes in persons in different publication stages due to ownership change.

For the example I'll use appln_id 216544 that is patent EP1197791

I run SQL:
Select
  t11.APPLN_ID,     t11.PUBLN_NR,   t11.PUBLN_KIND,
  t11.PUBLN_date,    t27.applt_seq_nr,   t06.PERSON_ID,
  t06.PERSON_NAME,   t06.PERSON_ADDRESS,   t06.PERSON_CTRY_CODE
From
  patstat.tls227_pers_publn t27 Inner Join
  patstat.tls206_person t06 On t27.person_id = t06.PERSON_ID Inner Join
  patstat.tls211_pat_publn t11 On t11.PAT_PUBLN_ID = t27.pat_publn_id
Where
  t11.APPLN_ID = 216544      And
  t27.applt_seq_nr > 0;

APPLN_ID	PUBLN_NR	PUBLN KIND	PUBLN_date	Applt seq_nr	PERSON ID	PERSON_NAME	PERSON ADDRESS	PERSON CTRY_CODE
216544	'1197791'	'A2'	'2002-04-17'	1	152352	'Sony International (Europe) GmbH'	'Kemperplatz 1,  10785 Berlin'	'DE'
216544	'1197791'	'A2'	'2002-04-17'	2	330065	'University Of Durham'	'South Road, Durham DH1 3LE'	'GB'
216544	'1197791'	'A3'	'2002-12-04'	1	152352	'Sony International (Europe) GmbH'	'Kemperplatz 1, 10785 Berlin'	'DE'
216544	'1197791'	'A3'	'2002-12-04'	2	330065	'University Of  Durham'	'South Road, Durham DH1 3LE'	'GB'

Thus we could evict there is no change of ownership.
On the other hand we may also check the registry where we find different informations:

Applicant(s)	For all designated states Sony Deutschland GmbH Kemperplatz 1 10785 Berlin / DE
	[2007/24]
Former [2005/40]	For all designated states Sony Deutschland GmbH Hugo-Eckener-Strasse 20 50829 Köln / DE
Former [2003/05]	For all designated states Sony International (Europe) GmbH Kemperplatz 1 10785 Berlin / DE
Former [2002/16]	For all designated states Sony International (Europe) GmbH Kemperplatz 1 10785 Berlin / DE
	For all designated states University Of Durham South Road Durham DH1 3LE / GB

So we obtain that the last owner is Sony Germany alone and not Sony international with Univ Durham.
This allows us to deduct that the registry could be the most reliable source both for last owner and for ownership change.