Invalidity dossier
US 4700712
Method for determining the starting point and the end point of closed spatial signal patterns
Current assignee: Harman International Industries Inc
Added 9/23/2026, 10:43:20 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US4700712A
Title: Method for determining the starting point and the end point of closed spatial signal patterns
Patent number: US4700712A | Application number: US06/896,835
Inventor: Johann J. Schmid
Original assignee: Willi Studer AG Fabrik fuer Elektronische Apparate
Current assignee (as listed): Harman International Industries Inc — the source notes listed assignees may be inaccurate and that no assignee analysis was performed.
Priority date: 1985-08-30 | Filing date: 1986-08-15 | Grant/publication date: 1987-10-20
Legal status: Expired – Fee Related; anticipated expiration 2006-08-15 (the listing states this is an assumption, not a legal conclusion).
Purpose: To determine the starting and end points of a spatial closed signal pattern within a time sequence of such patterns, each formed by measuring signals picked up from a living being via electrodes. The text uses vectorcardiography as its example, referring to QRS, T and P loops; it also permits determining the known "J-point" and classifying individual detected patterns.
Plain-language scope: A predetermined number of spatial slope values are determined for the patterns. Sequences of consecutive spatial slope values from different patterns are selected and mutually correlated. The correlation associates the sequences with different classes, and for each class a sequence of consecutive weighted average spatial slope values is formed; a temporal offset is also determined for each sequence relative to that weighted-average sequence. A minimum spatial slope value is found for each end region of the weighted-average sequence, and, from those minima and the temporal offset, moments of time are derived for each individual sequence. Those moments are defined as the starting point and end point of each individual spatial closed signal pattern. The described benefit is reduced computation expenditure; FIG. 4–7 illustrate the correlation and weighted-averaging steps, and FIGS. 3a–3d give a flow diagram of steps 31–54.
Not established by this excerpt: the full claim set and claim language; the complete specification and omitted passages; the precise implementation of steps 31–54; any prior art, litigation, validity, or ownership-transfer facts.
Source: https://patents.google.com/patent/[US4700712](/patent/US4700712)/en
Generated 10/1/2026, 9:33:13 PM
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Assignment history
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Prior art
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