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(11)

EP 3 192 332 A2

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(88) Date of publication A3: 26.05.2016 (43) Date of publication: 19.07.2017 Bulletin 2017/29 (21) Application number: 15794345.7 (22) Date of filing: 11.09.2015

(51) International Patent Classification (IPC):  H05C 1/04(2006.01) H01F 30/02(2006.01) (86) International application number: PCT/NZ2015/050143 (87) International publication number: WO 2016/039648 (17.03.2016 Gazette 2016/11)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 12.09.2014 NZ 63175314 12.09.2014 NZ 63176014 (71) Applicant: Tru-Test Limited Mt. Wellington Auckland 1060 (NZ)	(72) Inventor: WOODHEAD, Robert Charles Bryan Auckland 2014 (NZ) (74) Representative: Copsey, Timothy Graham et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)