EP 1101005 A1 20010523 - A SECURITY SYSTEM
Title (en)
A SECURITY SYSTEM
Title (de)
SICHERHEITSSYSTEM
Title (fr)
SYSTEME DE SECURITE
Publication
Application
Priority
- GB 9901943 W 19990617
- GB 9816409 A 19980729
Abstract (en)
[origin: WO0006858A1] A security system is disclosed in which a security control unit (12) transmits a coded signal component (S1) at a first frequency (F1) to a remote transponder unit (14). The security signal has two components (S1, S2) which are transmitted at different frequencies (F1, F2) and the frequency of transmission of the second signal component (F2) is encoded in the first signal component (S1). The remote unit (14) is arranged to decode the frequency (F2) of the second signal component (S2) from the first signal component (S1) and therefrom to tune itself to receive the second signal component (S2).
IPC 1-7
IPC 8 full level
G07C 9/00 (2006.01)
CPC (source: EP)
G07C 9/00309 (2013.01); G07C 2009/00555 (2013.01); G07C 2009/00793 (2013.01); G07C 2209/61 (2013.01)
Citation (search report)
See references of WO 0006858A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0006858 A1 20000210; AU 4519099 A 20000221; DE 69920233 D1 20041021; DE 69920233 T2 20051124; EP 1101005 A1 20010523; EP 1101005 B1 20040915; GB 9816409 D0 19980923
DOCDB simple family (application)
GB 9901943 W 19990617; AU 4519099 A 19990617; DE 69920233 T 19990617; EP 99928063 A 19990617; GB 9816409 A 19980729