A Blackberry can be used to sign a TEAS form (using the e-signature approach), with certain workaround steps. Do not click directly on the provided link (i.e., at, e.g., “To sign Trademark/Service Mark Application, Principal Register electronically, please CLICK HERE,”); otherwise, an error will result. Instead, you must copy the long link provided beneath the above (i.e., e.g. https://teasplus.uspto.gov/submit250/sign.service?id=USPTO/FTK-10.113.1… ). Then, go to the web browser and paste in the entire link. By way of example, here are specific instructions presented to the USPTO by a Blackberry user: 1). Go into the T-zones web browser (browser provided by this user’s service provider, i.e., T-mobile); 2). Click “Track wheel” and select “Paste;” 3). Click “Track wheel” again, and select “O.K.;” 4). This should result in the signature page being displayed, wherein the signature and date can be entered.