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| Number | Title | Issue Date |
| 4583553 | Ambulatory ECG analyzer and recorder An ambulatory cardiac analyzer and recorder includes an allocation and priority scheme which has quotas for classes of QRS events and priority between types of events within a class. The quality of a low priority event is used to replace a similar type of... | 04/22/1986 |
| 4494551 | Alterable frequency response electrocardiographic amplifier An electrocardiographic amplifier having an integrator in the feedback loop between the amplifier's input and output whose time constant is varied by the duty cycle of a series switch to vary the low frequency 3 dB roll-off point as a function of the dete... | 01/22/1985 |
