21 February 2022 Priya Vaidya 1144 Case Updates Tehrani v Hamilton Bonaduz AG [2021] EWHC 3457 (IPEC) byPriya Vaidya The case: The claimant (“Professor Tehrani”) is the proprietor of UK Patent No. 2,424,721 (“the Patent”). The Patent has the title “Method and apparatus for controlling a ventilator”, the ventilator being of the type used to assist a patient to breathe by delivering oxygen and removing carbon dioxide. The defendants (collectively “Hamilton”) make and sell ventilators. Some of the ventilators incorporate what is called the “Intellivent-ASV System”. Professor Tehrani alleges that the marketing of the Invellivent-ASV System has infringed the Patent. Hamilton deny infringement and counterclaim for revocation of the Patent on the grounds of lack of novelty, lack of inventive step and insufficiency. To continue reading you must be an EWI member, become a member and access exclusive content. Already a member? Login Share Print Tags 06. Rules and Regulations11. Report Writing15. Giving Oral Evidence Related articles Disability and exclusion from school Philipa Hodgson v Dr Daniel Hammond & Anor [2025] EWHC 1261 (KB) Unresponsive episodes in a child and the role of chloral hydrate Access to public domain documents pilot A Day in the Life of a Digital Forensics Expert Witness Switch article Original Beauty Technology Co. Ltd v G4K Fashion Ltd [2021] EWHC 3439 (Ch) Previous Article United States of America v Assange [2021] EWHC 3313 (Admin) Next Article Comments are only visible to subscribers.