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GB1002692A
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T-squares and like drawing instruments
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GB944634A
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Slide rules
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GB932262A
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Desks
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GB933983A
|
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Desks
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GB938752A
|
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Drawing instrument containers
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GB851885A
|
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Improvements in or relating to drawing instruments
|
|
GB754711A
|
|
An improved drawing pen
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|
GB722242A
|
|
Improvements in or relating to mathematical drawing instruments
|
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GB684850A
|
|
Improvements in or relating to hinge joints for drawing instruments
|
|
GB678814A
|
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Improvements in or relating to knee-joints for the legs of drawing instruments
|
|
GB660990A
|
|
Improvements in or relating to drawing boards and the like
|
|
GB523165A
|
|
Improvements in drawing instruments
|
|
GB413112A
|
|
Magnifying contrivances for the cursors of slide rules
|
|
GB221648A
|
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Improvements in and connected with needle points for mathematical instruments
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