U.S. Patent 8049732 was awarded to Apple Inc. on 2011-11-01 and describes a “Front-end signal compensation.” This patent has been cited 271 times by other U.S. patents which places it in the top 500 cited patents since 2010 according to our law firm research, and makes it of the most innovative computer technology patents in the field of electrical engineering. The abstract states:

A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage. Link: U.S. Patent 8049732

This patent was originally filed on 2007-01-03 which gives it a processing time of 1763 days, compared to an average processing time of 1638 in the field. Apple Inc. has 15027 total patents. The first named inventor is Steven Hotelling of Los Gatos, CA. The primary examiner was Quan-Zhen Wang.

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