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Re: www.quarter-wave.com

Hi V

Back at Servodrive / Sound Physics Labs, we began selling speakers for commercial sound with the drivers tapped forward of the apex in 1999 and I later received a patent (Unity horn) for it.
I built the first Tapped bass horn about 5 years ago and have applied for a patent on it also, at Danley Sound Labs, we have been selling them as a commercial product since January 2005.
There is / was no association with Martin’s work other than the field of interest.

Tom

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