Opinion ID: 859161
Heading Depth: 3
Heading Rank: 1

Heading: A heart rate monitor for use by a user in asso-

Text: ciation with exercise apparatus and/or exercise procedures, comprising: an elongate member; electronic circuitry including a difference amplifier having a first input terminal of a first polarity and a second input terminal of a second polarity opposite to said first polarity; said elongate member comprising a first half and a second half; BIOSIG INSTRUMENTS, INC. v. NAUTILUS, INC. 5 a first live electrode and a first common electrode mounted on said first half in spaced relationship with each other; a second live electrode and a second common elec- trode mounted on said second half in spaced rela- tionship with each other; said first and second common electrodes being connected to each other and to a point of common potential . . . . ’753 patent col. 5 ll. 17–36 (emphases added). In addition to the capability of substantially removing EMG signals, claim 1 recites a monitor, a means for measuring time intervals between heart pulses, and a means for calculating the heart rate of a user using the measured time intervals. See id. col. 5 l. 37–col. 6 l. 15. Asserted–dependent claim 11 further specifies that the claimed “elongate member” is “mounted on an exercise apparatus.” Id. col. 7 ll. 17–20. Figures 7 and 8 are illustrative of a heart rate monitor mounted on a bicycle and a stair-climbing exercise machine: 6 BIOSIG INSTRUMENTS, INC. v. NAUTILUS, INC. Id. figs. 7–8.