Simulating a button being pressed to download a PDF file.

[ScooterNorm]

I am trying to download the PDF file from this Web page.

https://tsdr.uspto.gov/documentviewer?caseId=sn97775647&docId=NFIN20231101163538&linkId=5#docIndex=0&page=1

The HTML code looks like:

...
<input id="back" type="button" class="page displayNone" value="Back" title="back to normal display (b)"></input></span>
    <h3>USPTO TSDR Case Viewer
        <a class="tdr_search1 helpIconh2" href="javascript:page.helpOverlay.open( 'doc_viewer' )" title="Click here for help on case searches (1)               Document viewer help">
            <img class="helpIcon docs" src="img/icn-Help16x16.gif" alt="Help"></img>
        </a>
    </h3>
...

The web page has a button called "Download PDF" which I am trying to emulate.
I believe the button is executing

"<a class="tdr_search1 helpIconh2" href="javascript:page. ..."

It is using javascript, I think, which I am far from an expert with. So how can I simulate the button "Download PDF" being pushing?

Thanks for all your help,