U.S. federal trademark · Serial No. 73510039 · Reg. No. 1395385
MODULATING AMPLIFIER WHICH PROVIDES CURRENT TO A LIGHT EMITTING DIODE, AND WHICH RECEIVES CURRENT OF VARYING AMPLITUDE FROM A PHOTODETECTOR AND SELECTIVELY CONVERTS THE CURRENT TO A DIGITAL OUTPUT BY MEANS OF AN ON AND OFF SWITCH, TO PROVIDE CURRENT FOR A COMPUTER, COUNTER, OR SIMILAR DEVICE
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