Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2006-02-28
2006-02-28
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S176000
Reexamination Certificate
active
07005945
ABSTRACT:
Method and apparatus for protecting a filter trap that is utilized in a coaxial cable system against theft of service. A shield is mounted inside the filter trap which contains a pair of end connectors that are aligned along a common axis. The shield has two parallel end faces that are perpendicularly aligned with regard to the common axis. A barrier is mounted on one or both end faces for intercepting a cutting tool moving along the axis to direct the tool away from the axis causing the tool to break or to prevent a passage to be completed between the end connectors.
REFERENCES:
patent: 5278525 (1994-01-01), Palinkas
patent: 5632651 (1997-05-01), Szegda
patent: 6529103 (2003-03-01), Brendel et al.
patent: 6759927 (2004-07-01), Maguire et al.
Lanz Charles N.
Purdy Eric J.
Ham Seungsook
John Mezzalingua Associates Inc.
Wall Marjama & Bilinski LLP
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