(19)
(11) EP 3 209 503 A1

(12)

(43) Date of publication:
30.08.2017 Bulletin 2017/35

(21) Application number: 15816640.5

(22) Date of filing: 23.10.2015
(51) International Patent Classification (IPC): 
B42D 25/346(2014.01)
G09F 3/00(2006.01)
B42D 25/435(2014.01)
G06K 19/00(2006.01)
(86) International application number:
PCT/BG2015/000036
(87) International publication number:
WO 2016/061646 (28.04.2016 Gazette 2016/17)
(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:
MA

(30) Priority: 23.10.2014 BG 11184614

(71) Applicant: Keit Ltd.
1712 Sofia (BG)

(72) Inventors:
  • GRANCHAROV, Vitan Kanev
    Sofia 1712 (BG)
  • ZHELVE, Georgi Zhivkov
    Sofia 1715 (BG)

(74) Representative: Varbanov, Julian Ivanov 
J. Varbanov & Partners Ltd. South Park Complex, bl. 1, entr. A, 2nd Floor
Sofia 1421
Sofia 1421 (BG)

   


(54) METHOD FOR PROTECTING BOUND DOCUMENTS AGAINST COUNTERFEITING BY MEANS OF PERFORATION