We can check whether a particular patch has been applied in Oracle in 2 ways, from the front end form or from the backend. Both methods are given below.
Apps form
Responsibility: System Administrator
Navigation: System Administration > Oracle Applications Manager > License Manager
Click on Licensed Products under Reports
The list of licensed applications/modules are displayed here. Click on a Product Name, say Payables.
The patches applied for this module are displayed. You can search for the patches as well.
Using SQL
The same patches can be viewed from the database. All installed patches are listed in AD_BUGS table.
Run the following SQL,
SELECT * FROM ad_bugs WHERE bug_number = '14488491'
Cheers!