Platens or like sheet supports for manifolding using pressure-sensitive layers or intermediaries, e.g. for book-keeping purposes (B41L3)

ethod for automatic control by means of an optoelectronic device // 2146622
The invention relates to a method of control using optoelectronic devices print quality images on paper

Device for counting paper sheets in the foot // 2131358
The invention relates to printing machinery, and can be used for counting paper sheets in the foot
 
2551267.
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