Pattern Templates are best described as printable tables designed specially for recording your "Patterns" from the TB-303 / TB-03.
Acid Tabs can also be used with 303 "clones" such as the Behringer TD-3, for example.
However, this being said, the Behringer TD-3 does allow users to back up each individual pattern sequence via USB.
There are 2 blank Pattern Templates to choose from. Both of which will be explained in great detail below.
Both of these templates can be accessed below the menu title "TB-303 Blank Templates" via "TB-303 Patterns & Templates".
The 2 options appear below the above highlighted heading.
The image above displays the option TB-303 Blank Pattern Template, which will take you to the "Blank" pattern generator page.
The above image displays the option TB-303 Prefill Pattern Template, which will take you to the "Prefill" pattern generator page.
Now you are aware of these 2 separate Pattern Template pages, click the links above to learn more regarding each of the template generators.