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I have to ask: are they estopped from challenging the validity of the patent?</div>
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Rebecca Tushnet</div>
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she/her</div>
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Frank Stanton Professor of the First Amendment, Harvard Law School</div>
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703 593 6759</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> E-trademarks <e-trademarks-bounces@oppedahl-lists.com> on behalf of Alex Butterman via E-trademarks <e-trademarks@oppedahl-lists.com><br>
<b>Sent:</b> Monday, April 29, 2024 6:49 PM<br>
<b>To:</b> e-trademarks@oppedahl-lists.com <e-trademarks@oppedahl-lists.com><br>
<b>Cc:</b> Alex Butterman <abutterman@dbllawyers.com><br>
<b>Subject:</b> [E-trademarks] USPTO accused of infringing 6 patents in rare lawsuit</font>
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<p class="x_MsoNormal"><font size="2" face="Arial"><span style="font-size:11.0pt; font-family:"Arial",sans-serif">This looks like a blog topic for Carl’s blog if not yet already written.
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<p class="x_MsoNormal" style="line-height:18.75pt"><font size="3" color="#999999" face="Helvetica"><span style="font-size:11.5pt; font-family:"Helvetica",sans-serif; color:#999999"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__r.smartbrief.com_resp_rVkpCjqUzaDzBirVCignacCicNySjC-3Fformat-3Dmultipart&d=DwMFAg&c=WO-RGvefibhHBZq3fL85hQ&r=E-M4OQvQBo8UWqE1LwEiDR3PcWlfM0I-0jiI1c4ous0&m=cnzevWmVJhPw9pQm41fuI4VvX7QuDgrkcP3souHRtwPgnhSv5b50QJaQU2Wqt8a7&s=dw1RVImGmGLKcnn1Vf5dOfVc7JwBE_b6BnYgUScHcv4&e=" target="_blank"><b><font size="5" color="#e4002b"><span style="font-size:16.0pt; color:#E4002B; font-weight:bold; text-decoration:none">USPTO
accused of infringing 6 patents in rare lawsuit</span></font></b></a> </span></font><font size="3" color="#999999" face="Helvetica"><span style="font-size:11.5pt; font-family:"Helvetica",sans-serif; color:#999999"></span></font></p>
<p class="x_MsoNormal" style="line-height:18.75pt"><font size="3" color="black" face="Helvetica"><span style="font-size:11.5pt; font-family:"Helvetica",sans-serif; color:black">A lawsuit filed against the US Patent and Trademark Office by Virginia-based Factor2
Multimedia Systems alleges that the agency infringed six patents via the use of two-factor authentication on USPTO websites, marking a rare instance of a patent infringement lawsuit against the agency. A Bloomberg Law analysis found 51 patent infringement
cases have been brought against the federal government since 2014 and that only two of those, including the Factor2 case, were filed against the USPTO.</span></font></p>
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Law</span></a></span></font></span><span class="x_mobilewrap"><font size="3" color="#999999" face="Helvetica"><span style="font-size:11.5pt; font-family:"Helvetica",sans-serif; color:#999999"> (4/29)</span></font></span><font size="1" color="#999999" face="Helvetica"><span style="font-size:6.0pt; font-family:"Helvetica",sans-serif; color:#999999">
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<p class="x_MsoNormal"><b><font size="3" color="black" face="Arial"><span style="font-size:12.0pt; font-family:"Arial",sans-serif; color:black; font-weight:bold">Alex Butterman</span></font></b></p>
<p class="x_MsoNormal"><font size="3" color="black" face="Arial"><span style="font-size:12.0pt; font-family:"Arial",sans-serif; color:black">Partner<b><span style="font-weight:bold">
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<p class="x_MsoNormal"><b><font size="3" color="#37428a" face="Avenir Next"><span style="font-size:12.0pt; font-family:"Avenir Next"; color:#37428A; font-weight:bold">DUNLAP </span></font></b><b><font size="3" color="#616a73" face="Avenir Next"><span style="font-size:12.0pt; font-family:"Avenir Next"; color:#616A73; font-weight:bold">BENNETT </span></font></b><b><font size="3" color="#37428a" face="Avenir Next"><span style="font-size:12.0pt; font-family:"Avenir Next"; color:#37428A; font-weight:bold">&
LUDWIG</span></font></b><font size="3" color="#156082" face="Calibri"><span style="font-size:12.0pt; font-family:"Calibri",sans-serif; color:#156082"></span></font></p>
<p class="x_MsoNormal" style="margin-bottom:3.0pt"><i><font size="3" color="black" face="Arial"><span style="font-size:12.0pt; font-family:"Arial",sans-serif; color:black; font-style:italic">211 Church St., SE; Leesburg, VA 20175</span></font></i></p>
<p class="x_MsoNormal" style="margin-bottom:3.0pt"><font size="3" color="black" face="Arial"><span style="font-size:12.0pt; font-family:"Arial",sans-serif; color:black">T: 703-777-7319</span></font><font size="3" color="#156082" face="Arial"><span style="font-size:12.0pt; font-family:"Arial",sans-serif; color:#156082">
– </span></font><font size="3" color="#156082"><span style="font-size:12.0pt; color:#156082"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.dbllawyers.com_attorney_alex-2Dbutterman_&d=DwMFAg&c=WO-RGvefibhHBZq3fL85hQ&r=E-M4OQvQBo8UWqE1LwEiDR3PcWlfM0I-0jiI1c4ous0&m=cnzevWmVJhPw9pQm41fuI4VvX7QuDgrkcP3souHRtwPgnhSv5b50QJaQU2Wqt8a7&s=-8pvp_sm5lcK0u0LCfIChU0uok7jwx8kJfGuR2JDma8&e="><b><font color="blue" face="Arial"><span style="font-family:"Arial",sans-serif; color:blue; font-weight:bold">BIO</span></font></b></a></span></font></p>
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