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Donald James Leslie

(April 13, 1911 - September 2, 2004)

Inventor of the Leslie and the Mercotac.

Included from DonLesliesPatents

Here are a few of the 50 or so patents issued to DonLeslie:

Year     Number        Inventor(s)                         Title/Description
1952   2,622,692      Leslie           Apparatus for imposing vibrato on sound.
1952   2,622,693      Leslie           Apparatus for imposing vibrato on sound.
1962   3,058,541      Leslie           Rotary electrostatic speaker.

A more complete collection of Leslie's patents has been compiled by ?JohnFine as is available at

From The Hammond Technical List, Sat, 4 Sep 2004:

To all Don Leslie's friends, fans and collegues it is with deep regret we announce his passing on Thursday September 2nd at his home in Altadena, surrounded by his family. He was 93 and sharp as ever right to the end. We wish to extend our sincerest gratitude to all those who may want to send a note or a thought. Please use the following email address:


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