U.S. Patent 7944175 was awarded to Maytag Corporation on 2011-05-17 and describes a “Battery charging systems.” This patent has been cited 245 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 electrical machinery, apparatus, energy patents in the field of electrical engineering. The abstract states:

A system for charging a power tool battery includes a charging device capable of charging a battery, a memory device capable of storing data of a plurality of sound patterns, a selecting device capable of selecting a sound pattern data from the plurality of sound patterns, and a sound generating device capable of generating a sound based on the selected sound pattern data when the charging operation of the battery by the charging device has been completed. Link: U.S. Patent 7944175

This patent was originally filed on 2007-04-24 which gives it a processing time of 1484 days, compared to an average processing time of 1340 in the field. Maytag Corporation has 1977 total patents. The first named inventor is Tatsuki Mori of Anjo, Aichi. The primary examiner was Edward Tso.

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