Patent drafting for medical devices in Israel requires engineering expertise and careful attention to Israeli patent law. Drori Stav IP assists medical device companies, start-ups, inventors and foreign patent counsel in preparing and prosecuting patent applications. The objective is to protect the technical contribution without restricting the claims unnecessarily to one prototype.
Medical devices often operate inside the human body, contact living tissue or function under changing physiological conditions. An invention may concern the structure of a device, its delivery, fixation, deployment, safety or retrieval mechanisms. In Israeli patent drafting it is especially important to distinguish a patentable device from a method of medical treatment, which is excluded under Section 7(1) of the Patents Law.
Sections 12 and 13 of the Israeli Patents Law, 5727-1967, require an enabling specification and claims supported by the disclosure. A foreign claim set must be assessed under these Israeli requirements rather than simply reproduced from a corresponding US or European application.
Drafting Claims for a Medical Device and Its Interface with the Body
Consider a steerable catheter designed to reach a particular area of the heart. It includes a flexible tube, a steering element and a mechanism transmitting force to the distal tip. Merely listing those components may not distinguish the invention from prior technology.
If the contribution lies in steering the distal tip without undesired movement of another part of the catheter, the drafter should define the relationships between the tube, steering elements and force transmission mechanism. An implant, catheter or surgical device may have to interact with tissues of varying mechanical properties. The claims should distinguish features essential to operation in that environment from optional features of a particular prototype.
A statement that a device “permits safe insertion” describes a desired result but does not replace a technical description of the mechanism. The claimed solution must be supported by the Israeli specification.
Delivery, Deployment and Release Mechanisms for Implants
Controlling the position of an implant before final release is a recurring issue. A heart valve delivered by catheter may initially be compressed, expand into a functional position and, in certain systems, be recompressed, repositioned or retrieved. These operational stages may embody the invention.
US Patent No. 9,867,700 B2, assigned to Edwards Lifesciences, granted in 2018, illustrates the drafting issues. Claim 1 describes a prosthetic valve with a self-expanding frame, elongated shaft, suture-retaining component, suture loops, release component and outer sheath. The loops maintain the connection to the delivery system after expansion; advancing the sheath may recompress the valve.
The claim does not merely state that a valve is repositionable. It identifies interacting parts. Dependent Claim 4 addresses release of the suture loops, while Claim 9 adds features involving movement of the sheath, tensioning of the loops and recompression of the valve frame.
The lesson for an Israeli application is to determine which features are essential to the independent claim and which are suitable for dependent claims. Each limitation may influence claim scope and enforcement against a competing device. This foreign patent is a drafting illustration, not a statement of what the Israel Patent Office would necessarily allow.
Fixing Medical Devices to Tissue: A Pacemaker Example
Attaching a device to living tissue differs from joining ordinary mechanical parts: the fixation mechanism must accommodate tissue movement, forces acting on the device and sometimes subsequent detachment.
US Patent No. 9,358,387 B2, assigned to Biotronik, granted in 2016, concerns a leadless pacemaker designed for placement inside the heart. Claim 1 describes a flexible hook-shaped wire that engages tissue when the device is rotated in one direction and disengages when it is rotated in the other.
The claim includes structural limitations regarding the wire, its free ends and its position relative to the pacemaker’s longitudinal axis. Dependent Claim 14 refers to stainless steel and nitinol, while Claim 15 specifies a wire diameter of 0.1 to 0.5 millimeters.
These claims illustrate why material and dimensional limitations need careful treatment. A specific diameter or material may be technically justified, but placing it in an independent Israeli claim could narrow the protection where alternative implementations are disclosed and supported.
Specifications and Drawings for Medical Device Patents in Israel
Drawings have particular importance because the inventive mechanism may not be evident from a view of the assembled device. An implant application may need illustrations showing insertion, deployment, fixation, release and retrieval, rather than only its final position.
In the Edwards patent, Figures 31A–37 show elements of suture retention, their connection to the frame and covering and release operations. In the Biotronik patent, Figures 1A–1C and 3A–3B show the pacemaker body and fixation mechanisms. Cross-sections can explain interior structures and the device’s relationship with anatomical tissue.
Drawings do not replace written disclosure. If operation depends on flexibility, actuation force, angles or relative component positions, the relevant features should be explained in words. Materials such as nitinol may require an explanation of the properties that matter to the invention.
Clinical trials and full safety testing are not automatically required for every medical device patent application. Nevertheless, the description must enable the claimed invention under Section 12 of the Israeli Patents Law. For further discussion, see Yonatan Drori, Patent Law (Hebrew, 2023), Chapter 5 and Section 5.2.3 on sufficiency of disclosure.
Medical Treatment Methods and the Israeli Patent Exclusion
Section 7(1) of the Israeli Patents Law excludes a process for therapeutic treatment of the human body. It is therefore important to distinguish a claim to an implant fixation mechanism from a claim to the medical sequence of actions performed by a physician when implanting it.
European law contains a related exclusion under Article 53(c) EPC, explained in the EPO Guidelines on methods of treatment and diagnosis. That foreign guidance is comparative; the starting point for Israeli drafting is the Israeli statute and its interpretation.
Drori, Patent Law, Section 2.3.2, examines the Israeli exclusion, its rationale and the case law, including the Plantex matter. A device used in medical treatment is not automatically excluded merely because a physician employs it. The substance of the invention and the category and language of the claims matter.
Planning Patent Protection for Future Device Versions
At the initial filing stage, counsel should examine whether the inventive solution can operate with different anatomical sizes, materials and delivery arrangements, and whether those alternatives can be supported by the description. The main device, its delivery system, a disposable component and a separate safety mechanism may justify distinct protection strategies.
For an Israeli filing, the purpose is to define the technical contribution without unnecessary prototype-specific restrictions while satisfying the disclosure requirements. These decisions form part of patent prosecution in Israel.
Related reading: Patent Drafting Rules in Israel and Biotechnology and Pharmaceutical Patent Drafting in Israel.
