Wiesel v. Apple Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Joseph Wiesel (New York)
  • Defendant: Apple Inc. (Delaware)
  • Plaintiff's Counsel: Bochner PLLC
• Case Identification: 1:26-cv-01465, E.D.N.Y., 03/12/2026
• Venue Allegations: Venue is asserted based on the Plaintiff's residence within the district and Defendant Apple's alleged established places of business in the district, including retail stores in Brooklyn.
• Core Dispute: Plaintiff alleges that Defendant's Apple Watch Series 1-5, which include an irregular heart rhythm notification feature, infringe a patent related to the automated detection of atrial fibrillation.
• Technical Context: The technology concerns the use of wearable sensors, such as photoplethysmography (PPG) sensors, to analyze pulse patterns over time to screen for specific cardiac arrhythmias in a non-clinical setting.
• Key Procedural History: The complaint states it is a "protective measure" filed to preserve damage claims under the six-year statutory period. A prior lawsuit on the same patent and accused products was dismissed on August 11, 2025, and that dismissal is currently pending appeal at the U.S. Court of Appeals for the Federal Circuit. Plaintiff notes this complaint is intended to proceed only if the Federal Circuit affirms the dismissal on procedural grounds but not on the merits of the patent's validity.

Case Timeline

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 7,020,514 - "Method of and apparatus for detecting atrial fibrillation"

• Patent Identification: U.S. Patent No. 7,020,514, "Method of and apparatus for detecting atrial fibrillation," issued March 28, 2006 (the "'514 Patent").

The Invention Explained

• Problem Addressed: The patent describes a need for a way to automatically screen for atrial fibrillation outside of a clinical setting ʼ514 Patent, col. 3:26-30 It notes that existing commercially available devices could measure pulse rate over a preset time but did not analyze the rhythm of heartbeats to detect the specific, random irregularity characteristic of atrial fibrillation ʼ514 Patent, col. 3:33-41 It also identifies technical challenges such as "pulse deficit," where weak heartbeats are not detected, which could interfere with accurate rhythm analysis ʼ514 Patent, col. 2:23-34
• The Patented Solution: The invention provides a method and apparatus that automatically detects a sequence of pulse beats, measures the time intervals between successive beats, analyzes these intervals to determine if they exhibit an irregular pattern indicative of atrial fibrillation, and then communicates this finding to the user ʼ514 Patent, abstract The analysis can involve calculating the quotient of the standard deviation over the mean for a series of beat intervals and comparing it to a threshold ʼ514 Patent, col. 6:44-53 The patent discloses implementation using either a blood pressure cuff or a light-based sensor, such as a photoplethysmograph ʼ514 Patent, FIG. 1 ʼ514 Patent, FIG. 2
• Technical Importance: The technology aimed to provide a non-invasive, automated screening tool that could alert individuals to a potential serious heart condition, prompting them to seek professional medical evaluation ʼ514 Patent, col. 4:26-30

Key Claims at a Glance

• The complaint asserts independent claims 1 (a method) and 12 (an apparatus) Compl. ¶34 Compl. ¶37
• Independent Claim 1 (Method):
  • Detecting irregular pulse rhythms from a succession of time intervals between successive pulse beats.
  • Analyzing the detected irregular pulse rhythms to make a determination of possible atrial fibrillation.
  • Indicating the possible atrial fibrillation from the determination.
• Independent Claim 12 (Apparatus):
  • A detector configured to detect irregular pulse rhythms from a succession of time intervals between successive pulse beats.
  • A processor configured to analyze the detected irregular pulse rhythms for making a determination of possible atrial fibrillation.
  • An indicator configured to indicate the possible atrial fibrillation based on the determination.
• The complaint notes that infringed claims include 1, 7, 10, 12, and 16-18, thereby asserting dependent claims as well Compl. ¶46

III. The Accused Instrumentality

Product Identification

• Apple Watch Series 1, 2, 3, 4, and 5 (the "Accused Products") Compl. ¶41

Functionality and Market Context

• The complaint focuses on the "irregular rhythm notification feature" available on the Accused Products Compl. ¶21 This feature allegedly uses the watch's optical heart sensor (a photoplethysmography or "PPG" sensor) to measure beat-to-beat intervals in the background while the user is at rest Compl. ¶¶43-44 Compl. ¶51 If an algorithm detects an irregular rhythm suggestive of atrial fibrillation over multiple readings, the watch sends a notification to the user Compl. ¶51 Compl. ¶55 The complaint includes a chart comparing Apple Watch models which shows the "Irregular Rhythm Notification" feature is present on Series 1 through 4 and uses an "Optical heart sensor / PPG" Compl. p. 13 The complaint alleges this feature is critical to the product and is used to drive customer demand, citing statements from Apple executives and marketing materials Compl. ¶42 Compl. ¶51

IV. Analysis of Infringement Allegations

'514 Patent Infringement Allegations

Identified Points of Contention

• Technical Questions: The complaint alleges Apple's algorithm "classifies" a tachogram to determine if an irregular rhythm is present Compl. ¶58 A central question will be whether the specific analysis performed by Apple's proprietary software meets the "analyzing" limitation of the claims. The patent specification discloses a specific statistical method (calculating the quotient of the standard deviation over the mean) as an embodiment ('514 Patent, col. 6:44-53). The dispute may focus on whether Apple's method is the same or equivalent to the claimed analysis.
• Scope Questions: The construction of the term "analyzing" will be critical. The question for the court will be whether this term is limited to the specific statistical methods disclosed in the patent's examples or if it can be construed more broadly to encompass other algorithmic techniques for identifying rhythm patterns characteristic of atrial fibrillation from beat-to-beat interval data.

V. Key Claim Terms for Construction

The Term

• "analyzing the detected irregular pulse rhythms"

Context and Importance

• This term appears in both asserted independent claims and defines the core intellectual contribution of the patent-the automated determination of a specific arrhythmia, not just the detection of a pulse. The scope of "analyzing" will likely determine whether Apple's proprietary algorithm, the details of which are not public, falls within the claims. Practitioners may focus on this term because the patent's detailed description provides a specific mathematical implementation, which may create a point of contention regarding the breadth of the claim.

Intrinsic Evidence for Interpretation

• Evidence for a Broader Interpretation: The plain language of the claims does not recite a specific mathematical formula. It requires "analyzing" to "make a determination of possible atrial fibrillation" ʼ514 Patent, cl. 1 ʼ514 Patent, cl. 12 This language could support an interpretation that covers any algorithm that performs this function, regardless of the specific technique.
• Evidence for a Narrower Interpretation: The specification discloses a specific embodiment for the analysis: "an algorithm was developed that analyzed only the last ten beats...The mean and standard deviation of these last ten beats was calculated and the quotient of the standard deviation over the mean was determined. This was compared to a threshold value of 0.06." ʼ514 Patent, col. 6:44-50 A party could argue that this is the only disclosed method for performing the analysis and should thus inform, or even limit, the scope of the claim term.

VI. Other Allegations

Indirect Infringement

• While not explicitly pled in a separate count, the prayer for relief requests a judgment of infringement under 35 U.S.C. § 271(b), which covers induced infringement Compl., Prayer for Relief A The complaint alleges that Apple provides support materials and marketing that explain the irregular rhythm notification feature, which may form the basis for an allegation that Apple instructs and encourages users to use the Apple Watch in an infringing manner Compl. ¶23 Compl. ¶51

Willful Infringement

• The complaint alleges that Apple had actual knowledge of the '514 Patent since at least September 20, 2017, as a result of an initial notice letter and subsequent communications including claim charts from Dr. Wiesel Compl. ¶27 Compl. ¶28 It further alleges that Apple continued to infringe after receiving notice by launching new products (Apple Watch Series 4 and 5) and updating software on older models to include the accused functionality Compl. ¶31

VII. Analyst's Conclusion: Key Questions for the Case

• A primary issue will be one of procedural posture: how the court will manage this "protective" lawsuit while a prior, dismissed action involving the same patent, parties, and products is pending on appeal at the Federal Circuit. This raises threshold questions of judicial economy and potential claim preclusion.
• The central technical issue will be one of claim scope: whether the term "analyzing," as used in the claims, is broad enough to read on Apple's proprietary algorithm for detecting atrial fibrillation, or if its meaning is limited by the specific statistical method (standard deviation over mean) detailed in the patent's specification.
• A key evidentiary question will concern proof of infringement: what discovery will reveal about the internal workings of the Apple Watch's arrhythmia detection algorithm, and whether that evidence demonstrates that the accused software performs the specific steps of "detecting," "analyzing," and "indicating" as required by the patent's claims.