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US2717578A
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Fountain pen
|
|
GB541859A
|
|
Improvements in or relating to inter-locking apparatus
|
|
GB539536A
|
|
Improvements in or relating to interlocking apparatus for duplicating machines
|
|
GB540725A
|
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Improvements in or relating to moistening devices for machines for copying documents
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GB540726A
|
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Improvements in or relating to machines for copying documents
|
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GB538598A
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|
Improvements in or relating to machines for copying documents
|
|
GB538114A
|
|
Improvements in or relating to machines for copying documents
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|
US2231109A
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Polygraphing machine
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GB538399A
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Improvements in or relating to a method and mechanism for the inking of stencil duplicating machines
|
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GB513847A
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Typewriter ink ribbon with ink reservoir zone
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GB496011A
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Improvements in or relating to carbon paper
|
|
GB399128A
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Improvements in and relating to tear-off blocks, pads, books, and the like
|
|
GB400123A
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Improvements in and relating to collapsible tubes
|
|
GB417958A
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Improved process and apparatus for recording electrical impulses
|
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GB350976A
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|
Improvements in or relating to stencil sheets
|
|
GB345972A
|
|
Improvements in or relating to packing for carbon paper
|
|
GB232239A
|
|
Improvements in or relating to duplicating or copying documents
|
|
GB205461A
|
|
Improved manufacture of stencil sheets for autographic and typewriting duplication purposes
|
|
GB201882A
|
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Improved manufacture of stencil-sheets for autographic and typewriting duplication purposes
|
|
CA241321A
|
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Stencil sheet production
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