(19)
(11)EP 4 309 290 A1

(12)

(43)Date of publication:
24.01.2024 Bulletin 2024/04

(21)Application number: 22770701.5

(22)Date of filing:  08.03.2022
(51)International Patent Classification (IPC): 
H04B 1/3827(2015.01)
H01Q 1/27(2006.01)
H01B 7/08(2006.01)
H04B 7/06(2006.01)
H01R 13/04(2006.01)
A62B 18/08(2006.01)
(52)Cooperative Patent Classification (CPC):
H04B 5/0031; H04B 5/0081; A62B 18/08; H04B 7/06; H01R 13/2421; H01R 12/777; H04B 7/08; H01Q 1/273; A62B 18/025; H04B 2001/3866; H04B 1/385
(86)International application number:
PCT/IB2022/052067
(87)International publication number:
WO 2022/195405 (22.09.2022 Gazette  2022/38)
(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

(30)Priority: 15.03.2021 US 202163161042 P

(71)Applicants:
  • 3M Innovative Properties Company
    Saint Paul, Minnesota 55133-3427 (US)
  • RTX A/S
    9400 Nørresundby (DK)

(72)Inventors:
  • THOMPSON, Darin K.
    Saint Paul, Minnesota 55133-3427 (US)
  • WILSON, Graham P.
    Saint Paul, Minnesota 55133-3427 (US)
  • EVANS, Gareth D.
    Saint Paul, Minnesota 55133-3427 (US)
  • PEDERSEN, Klaus A.
    9400 Nørresundby (DK)

(74)Representative: Mathys & Squire 
Theatinerstraße 7
80333 München
80333 München (DE)

  


(54)DECT SYSTEM WITH TWO OR MORE DIVERSE ANTENNAS FOR A RESPIRATORY PROTECTION MASK