(19)

(11)

EP 3 465 344 A1

(12)

(43) Date of publication: 10.04.2019 Bulletin 2019/15 (21) Application number: 17807139.5 (22) Date of filing: 20.02.2017

(51) International Patent Classification (IPC):  G03B 17/48(2006.01) G02B 21/36(2006.01) G02B 21/20(2006.01) H04M 1/04(2006.01) (86) International application number: PCT/US2017/018598 (87) International publication number: WO 2017/209810 (07.12.2017 Gazette 2017/49)

(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 MD (30) Priority: 31.05.2016 US 201615169078 (71) Applicant: Cheng, Du New York, NY 10021 (US)	(72) Inventor: Cheng, Du New York, NY 10021 (US) (74) Representative: Schwöbel, Thilo K. et al Kutzenberger Wolff & Partner Waidmarkt 11 50676 Köln 50676 Köln (DE)