Error! You must javascript enabled to use this form. Please enable Javascript in your browser. PatentBlast - Walker Digital Blasted (US6487291) PatentBlast has initiated new effort to counter the rising threat from NPEs. “We will be publishing litigation grade invalidity search reports for the patents asserted by NPEs. View full press release Your Name: Your Email: Subject: Question: We respects your privacy, the information you entered above will not be used to send unsolicited email, and will not be rented or sold to a 3rd party. Your contact information will be shared with the recipient of this message - Privacy Policy Send