mikebse2a3 Posted January 28, 2021 Share Posted January 28, 2021 I thought with the upcoming release of the Diamond Jubilee 75th anniversary and of course the Fully Horn-Loaded, Vented Subwoofers KPT-1802-HLS and rare KPT-1502-HLS that some might be interested in reading the patent. Note that it was filed on July 22, 1997 and the patent date of April 27, 1999. Here is the PDF: US5898138.pdf miketn Quote Link to comment Share on other sites More sharing options...
Schu Posted January 28, 2021 Share Posted January 28, 2021 Can anyone explain the asymmetry of that design? Quote Link to comment Share on other sites More sharing options...
babadono Posted May 10, 2021 Share Posted May 10, 2021 Patent drawings show just the "doghouse" of an 1802 correct? Quote Link to comment Share on other sites More sharing options...
Deang Posted May 10, 2021 Share Posted May 10, 2021 1997? Why they pushing old technology. 🙂 Quote Link to comment Share on other sites More sharing options...
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