Anti-tamper coatings in the nature of multi-layer coatings composed of embedded electromagnetic pathways and a frangible outer layer which can be applied to the surface of various items, including electronic circuit boards, upon completion of the manufacturing process to render a surface which would reveal unauthorized tampering

'anti':2 'anti-tamp':1 'appli':26 'board':36 'circuit':35 'coat':4,12 'complet':38 'compos':13 'electromagnet':16 'electron':34 'embed':15 'frangibl':20 'includ':33 'item':32 'layer':11,22 'manufactur':41 'multi':10 'multi-lay':9 'natur':7 'outer':21 'pathway':17 'process':42 'render':44 'reveal':49 'surfac':29,46 'tamper':3,51 'unauthor':50 'upon':37 'various':31 'would':48

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