(19)

(11)

EP 3 867 894 A1

(12)

(43) Date of publication: 25.08.2021 Bulletin 2021/34 (21) Application number: 19797854.7 (22) Date of filing: 16.09.2019

(51) International Patent Classification (IPC):  G09B 5/06(2006.01) (86) International application number: PCT/TR2019/000059 (87) International publication number: WO 2020/176045 (03.09.2020 Gazette 2020/36)

(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: KH MA MD TN (30) Priority: 27.02.2019 TR 201902975 (71) Applicant: Çelenk, Ulas Ankara (TR)	(72) Inventor: Çelenk, Ulas Ankara (TR) (74) Representative: Vavekis, Konstantinos  PO Box 1 Mesarmos Voutes 70013 Heraklion, Crete 70013 Heraklion, Crete (GR)