Encoding and decoding apparatus and instruments; analog signal and digital signal encoders for use in connection with electrical communications systems; electronic voice, fax and data encryption units; computer software for encryption in the field of secure communications; electronic optical data encryption units; electronic network encryption units; electronic text message encryption units for wireless phones and pocket PCs; secured wired and wireless telephones; secure radios

'analog':7 'apparatus':4 'communic':19,37 'comput':28 'connect':16 'data':25,40 'decod':3 'digit':10 'electr':18 'electron':21,38,43,47 'encod':1,12 'encrypt':26,31,41,45,50 'fax':23 'field':34 'instrument':6 'messag':49 'network':44 'optic':39 'pcs':57 'phone':54 'pocket':56 'radio':64 'secur':36,58,63 'signal':8,11 'softwar':29 'system':20 'telephon':62 'text':48 'unit':27,42,46,51 'use':14 'voic':22 'wire':59 'wireless':53,61

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