GB660639A - - Google Patents

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Publication number
GB660639A
GB660639A GB660639DA GB660639A GB 660639 A GB660639 A GB 660639A GB 660639D A GB660639D A GB 660639DA GB 660639 A GB660639 A GB 660639A
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United Kingdom
Prior art keywords
july
class
calculating
matter
subject
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English (en)
Publication of GB660639A publication Critical patent/GB660639A/en
Active legal-status Critical Current

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  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Electron Beam Exposure (AREA)
  • Credit Cards Or The Like (AREA)
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Publications (1)

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Family

ID=1750144

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Country Status (1)

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