(19)

(11)

EP 4 519 500 A1

(12)

(43) Date of publication: 12.03.2025 Bulletin 2025/11 (21) Application number: 23728560.6 (22) Date of filing: 05.05.2023

(51) International Patent Classification (IPC):  E01C 7/14(2006.01) E01C 11/00(2006.01) E01C 23/06(2006.01) E01C 7/18(2006.01) E01C 11/02(2006.01) (52) Cooperative Patent Classification (CPC): E01C 11/005; E01C 7/187; E01C 7/147; E01C 23/06; E01C 11/02 (86) International application number: PCT/US2023/066640 (87) International publication number: WO 2023/215852 (09.11.2023 Gazette 2023/45)

(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: 06.05.2022 US 202263364270 P (71) Applicant: Heritage Research Group, LLC Indianapolis, IN 46278 (US)	(72) Inventor: EXLINE, Marvin Keller Terre Haute, IN 47807 (US) (74) Representative: Mathys & Squire  The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)