GB246134A - - Google Patents

Info

Publication number
GB246134A
GB246134A GB246134DA GB246134A GB 246134 A GB246134 A GB 246134A GB 246134D A GB246134D A GB 246134DA GB 246134 A GB246134 A GB 246134A
Authority
GB
United Kingdom
Prior art keywords
calculator
book
bergmann
multiplication
jan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Publication date
Publication of GB246134A publication Critical patent/GB246134A/en
Expired legal-status Critical Current

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Landscapes

  • Document Processing Apparatus (AREA)
  • Calculators And Similar Devices (AREA)
  • Electrically Operated Instructional Devices (AREA)

Abstract

246,134. Bergmann, J. Jan. 15, 1925, [Convention date]. Adding and subtracting apparatus combined with a book of multiplication &c. tables. The calculator 3 is removably mounted in a recess provided in a stiff plate or cover 1 of the book, a spring 5 normally maintaining the calculator in position.
GB246134D Expired GB246134A (en)

Publications (1)

Publication Number Publication Date
GB246134A true GB246134A (en) 1900-01-01

Family

ID=1738513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB246134D Expired GB246134A (en)

Country Status (1)

Country Link
GB (1) GB246134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1078360B (en) * 1957-04-05 1960-03-24 Johannes Dogigli Table slider in connection with a book

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1078360B (en) * 1957-04-05 1960-03-24 Johannes Dogigli Table slider in connection with a book

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