(19)

(11)

EP 4 377 530 A1

(12)

(43) Date of publication: 05.06.2024 Bulletin 2024/23 (21) Application number: 22814161.0 (22) Date of filing: 09.11.2022

(51) International Patent Classification (IPC):  E04F 13/08(2006.01) E04F 13/14(2006.01) (52) Cooperative Patent Classification (CPC): E04F 13/0819; E04F 13/083; E04F 13/14 (86) International application number: PCT/IB2022/060768 (87) International publication number: WO 2023/099986 (08.06.2023 Gazette 2023/23)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 30.11.2021 EP 21472013 (71) Applicant: Stoyanov, Damian Vassilev 1000 Sofia (BG)	(72) Inventor: Stoyanov, Damian Vassilev 1000 Sofia (BG) (74) Representative: Benatov, Samuil Gabriel  Dr. EMIL BENATOV & PARTNERS 6, Asen Peykov Str. 1113 Sofia 1113 Sofia (BG)