The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2009
Filed:
Jul. 13, 2004
Graham Bank, Suffolk, GB;
Andrew Marchant, Cambridgeshire, GB;
Martin Colloms, London, GB;
Paul Burton, Cambridgeshire, GB;
Graham Bank, Suffolk, GB;
Andrew Marchant, Cambridgeshire, GB;
Martin Colloms, London, GB;
Paul Burton, Cambridgeshire, GB;
New Transducers Limited, Huntingdon Cambs, GB;
Abstract
A bending wave loudspeaker having an operating frequency range and a coincidence frequency which is above the operating frequency range, comprising a resonant panel having two generally orthogonal axes, vibration exciting means coupled to the panel to excite the panel into resonance along the one axis of the panel, and means restraining or preventing resonance along the other axis of the panel whereby the panel radiates an acoustic output which is of wide directivity along the one axis and of narrow directivity along the other axis of the panel.