Patents for inventions : Abridgments of specifications : Class 106(i) calculating, counting, and cashregistering apparatus

著者
    • Great Britain. Patent Office
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Patents for inventions : Abridgments of specifications : Class 106(i) calculating, counting, and cashregistering apparatus

Printed for H. M. Stationery Off, 1927-

  • A.D. 1916-20
  • A.D. 1921-25

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