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Abstract
Abstract THE FIGURE SHOWS A PROGRAMMING ROUTINE FOR AUTOMATICALLY PROCESSING AN ELECTROCARDIOGRAPH SIGNAL IN A DIGITAL COMPUTER TO DETERMINE WHETHER A REGULARLY SPACED TRAIN OF P-WAVES IS PRESENT IN THE PREVIOUSLY FOUND P-LIKE BUMPS OR WAVES OF THE SIGNAL. THE RESPECTIVE P-TO-P TIME INTERVALS BETWEEN SUCESSIVE P-LIKE WAVES OF THE SIGNAL ARE SEQUENTIALLY COMPARED TO EACH OF THE DIFFERENT P-TO-P TIME INTERVALS PREVIOUSLY STORED IN A TABLE OF P-TO-P TIME INTERVALS. EACH TIME A P-TO-P TIME INTERVAL FAIL TO MATCH, WITHIN A PREDETERMINED DEGREE OF TOLERANCE, INTERVALS PREVIOUSLY STORED IN THE TABLE, IT IS ADDED TO THE TABLE AS A NEW INTERVAL. EACH TIME AN INTERVAL IS ADDED TO THE TABLE, SYNTHESIZED FRACTIONAL SUBINTERVALS THEREOF ARE LIKEWISE COMPARED AND ADDED, IF THEY FAIL TO MATCH. A SEPARATE COUNT IS MAINTAINED OF THE NUMBER OF TIMES EACH INTERVAL IN THE TABLE IS MATCHED. THE COUNT OF THE INTERVAL WHICH IS MATCHED MOST OFTEN IS COMPARED WITH A BELIEVABILITY THRESHOLD TO DETERMINE WHETHER A REGULAR SPACED TRAIN OF P-WAVE IS PRESENT
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |