(19)

(11)

EP 3 939 341 A1

(12)

(43) Date of publication: 19.01.2022 Bulletin 2022/03 (21) Application number: 19713918.1 (22) Date of filing: 11.03.2019

(51) International Patent Classification (IPC):  H04W 4/021(2018.01) G08G 1/0967(2006.01) (52) Cooperative Patent Classification (CPC): G08G 1/0965; H04W 4/021; H04L 67/18; G08G 1/096791; H04W 4/90; H04W 4/02; H04L 67/22; H04W 4/40 (86) International application number: PCT/US2019/021604 (87) International publication number: WO 2020/185205 (17.09.2020 Gazette 2020/38)

(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 (71) Applicant: Whelen Engineering Company, Inc. Chester, CT 06412 (US)	(72) Inventor: LEMIEUX, Kenneth Groton, CT 06340 (US) (74) Representative: Prinz & Partner mbB  Patent- und Rechtsanwälte Rundfunkplatz 2 80335 München 80335 München (DE)