In a strongly worded rebuttal, Amazon.com on Thursday countersued IBM. The companies have charged each other with patent infringement. The countersuit, filed in the U.S. District Court for the Eastern District of Texas, denies that Amazon.com infringes IBM patents, seeks to invalidate some IBM patents and charges IBM with infringing on some Amazon.com patents. IBM illegally uses Amazon.com technology in WebSphere, a widely deployed application server, as well as in IBM information management services and products, Amazon.com claims. IBM and its customers thus infringe on Amazon.com patents, the Web retailer said. The Amazon.com patents enable a website to recommend products to customers based on their browsing and buying histories. Amazon.com made the claims in response to a patent-infringement suit that IBM filed in October. In addition to the counterclaims, Amazon.com argues that some of the patents that IBM charges it with infringing are unenforceable. “IBM’s broad allegations of infringement amount to a claim that IBM invented the Internet,” the suit reads. “If IBM’s claims are believed, then not only must Amazon.com pay IBM, but everyone conducting electronic commerce over the World Wide Web (indeed, every Website and potentially everyone who uses a Web browser to surf the Web) must pay IBM a toll for the right to do so.” The suit calls that idea “nonsense.” Amazon.com also refutes IBM’s accusations that it dragged its feet replying to IBM’s initial attempts to negotiate over use of the patents. In reality, Amazon.com has already proven that some of IBM’s claims are without merit, it says. After IBM first approached Amazon.com in 2002, the U.S. Patent and Trademark Office (USPTO) found that IBM was concealing prior art, which can invalidate a patent. The USPTO then told IBM that the patents were not infringed, were not valid and did not require a license, Amazon.com said. Amazon.com also pointed out that IBM waited until 2002, seven years after Amazon.com started up and just as Amazon.com became profitable, to ask for payment for using the patented technology. This shows that “IBM simply wants to siphon off the profits that Amazon.com has only recently earned through the professional risks and human efforts, ingenuity, and investment expended by Amazon.com as it charted a new path in the Internet age,” the lawsuit reads.Amazon.com asks the court for compensation for IBM’s infringement as well as damages and legal costs. At the time of IBM’s initial filing in October, patent experts observed that such infringement suits are risky because of the potential for judges to rule that a patent is invalid. They also said that the delay in making initial contact—seven years after Amazon.com launched—could work against IBM.-Nancy Gohring, IDG News Service (Dublin Bureau)Check out our CIO News Alerts and Tech Informer pages for more updated news coverage. Related content feature 10 most popular IT certifications for 2023 Certifications are a great way to show employers you have the right IT skills and specializations for the job. These 10 certs are the ones IT pros are most likely to pursue, according to data from Dice. By Sarah K. White May 26, 2023 8 mins Certifications Careers interview Stepping up to the challenge of a global conglomerate CIO role Dr. Amrut Urkude became CIO of Reliance Polyester after his company was acquired by Reliance Industries. He discusses challenges IT leaders face while transitioning from a small company to a large multinational enterprise, and how to overcome them. By Yashvendra Singh May 26, 2023 7 mins Digital Transformation Careers brandpost With the new financial year looming, now is a good time to review your Microsoft 365 licenses By Veronica Lew May 25, 2023 5 mins Lenovo news Alteryx works in generative AI for speedy analytics results OpenAI integration and AI wizardry for report generation are aimed at making Alteryx’s analytics products more accessible. By Jon Gold May 25, 2023 3 mins Analytics Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe