Quick and dirty - assume that you have good expirience with SSRS/T-SQL
If patch is deployed via VCM then check the output of the following queries:
SELECT Distinct template_id as Value, object_name AS Label
FROM dbo.ecm_sysview_sum_templates
Select * from dbo.ecmSUM_fn_template_assessment_t('template_id',0)
check value for deployement_date.
if this is what you're looking for - you're lucky) you should be able to pretty easy add this to mentioned report using Report builder - ensure to use version 2.0 for compatibility.
Regards, Oleg