(19)
(11) EP 1 751 386 A2

(12)

(88) Date of publication A3:
16.02.2006

(43) Date of publication:
14.02.2007 Bulletin 2007/07

(21) Application number: 05718531.6

(22) Date of filing: 21.01.2005
(51) International Patent Classification (IPC): 
E05F 15/20(2006.01)
G01L 1/00(2006.01)
(86) International application number:
PCT/IB2005/001149
(87) International publication number:
WO 2005/069723 (04.08.2005 Gazette 2005/31)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

(30) Priority: 21.01.2004 US 538314 P
27.08.2004 US 927702

(71) Applicants:
  • Tsui, Philip Y.W.
    Brampton ON L6Y 1J3 (CA)
  • Tsui, Gallen Ka-Leung
    Brampton ON L6Y 1J3 (CA)

(72) Inventors:
  • Tsui, Philip Y.W.
    Brampton ON L6Y 1J3 (CA)
  • Tsui, Gallen Ka-Leung
    Brampton ON L6Y 1J3 (CA)

(74) Representative: McLeish, Nicholas Alistair Maxwell et al
Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road
London WC1X 8BT
London WC1X 8BT (GB)

   


(54) SYSTEMS AND METHODS FOR OPERATING A BARRIER