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:
Nov. 17, 2009
Filed:
Dec. 22, 2003
William John Metheringham, Roos, GB;
David Anthony Johnson, Kilnwick, GB;
Brian Douglas Smith, London, GB;
Neil Munns, Kingston-Upon-Hull, GB;
Martin Geoffrey Aston, York, GB;
William John Metheringham, Roos, GB;
David Anthony Johnson, Kilnwick, GB;
Brian Douglas Smith, London, GB;
Neil Munns, Kingston-Upon-Hull, GB;
Martin Geoffrey Aston, York, GB;
Newlands Technology Limited, Yorkshire, GB;
Abstract
An acoustic transducer comprises an active element which changes in length along a first axis in response to an audiofrequency input signal, the element being mounted between an inertial mass and a foot which in use engages a surface whereby audiofrequency vibrations produced by the active element are transmitted to the surface, characterised in that the foot is hingedly connected to the inertial mass and the active element is located between the foot and the mass such that the angle between the first axis and the surface is less than 90°, in use.