Oracle patch version

Hi,

Could you please tell me how to find latest patch installed on Oracle 9i and lower versions? I am able to find this information for 10g and higher version using below SQL query, but I want to find same information for Oracle 9i and lower versions?

SELECT TO_CHAR(action_time, 'DD-MON-YYYY HH24:MI:SS') AS action_time,
       action,
       namespace,
       version,
       id,
       comments,
       bundle_series
FROM   sys.registry$history
ORDER by action_time;

Regards,

Bala