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Apple sued for a patent on the Apple Watch electrocardiogram

Apple has been sued by a doctor: he says that the Cupertino company would be deliberately violating its patent related to the technologies used in the Apple Watch that allow to identify the symptoms of atrial fibrillation (AFib).

The subject of the dispute is the patent 7,020,514 filed in the USA on March 28, 2007 in the name of Dr. Joseph Wiesel, entitled "Methods and apparatus for identifying atrial fibrillation". The patent in question exploits the plethysmography in combination with a photoelectric cell and a light source.

Although the name is difficult, the principle behind the system that on Apple Watch allows you to identify very simple strial fibrillation: red blood because it reflects red light and absorbs green light. Apple Watch uses green LED lights paired with light-sensitive photodiodes to detect the amount of blood flowing into your wrist at any given time.

With each beat of the heart, the flow of blood into the vessels of the wrist increases and consequently more green light is absorbed. Between one beat and the other the lesser flow, as well as the absorption of green light. By flashing the LED lights hundreds of times per second, Apple Watch can calculate how many times the heart beats every minute, thus measuring your heart rate. The optical heart rate sensor can measure an interval of 30 to 210 beats per minute. In addition, designed to compensate for low signal levels by increasing the brightness of the LEDs and the sampling rate.

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The patent of dr. Wiesel looks similar to the technology used by Apple on the Apple Watch. The doctor says that on September 20, 2017 he notified Apple of the existence of his patent, after the presentation of the Apple Watch 3. In the quotation it is claimed that Apple refused to negotiate in good faith, even after the presentation of detailed diagrams that illustrate the elements of the Wiesen patent, highlighting the commonalities with elements exploited on Apple Watch.

Dr. Wiesel aims to obtain royalties, the payment of attorney fees and compensation for the elapsed period without patent fees. We will follow the story to see what Apple's answer will be.

TO this address find one of ours article and a video showing the ECG function in Italian a woman with atrial fibrillation and comparison with a professional electrocardiograph. At this address our article with the opinion of a cardiologist to understand potential and how useful they can actually be.