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DE492235C
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Electrically powered calculator with a group of positive and negative multiplier keys
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DE421750C
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Display device for the position of a displaceable tooth on calculating machines
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DE401649C
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Device on calculating machines for moving the counter or signal box slide
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DE393954C
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Device for preventing the throwing of zero setting shafts on calculating machines and the like. like
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DE405483C
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Ten indexing disk for revolution counters of calculating machines
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DE386268C
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Calculating machine with two revolution counters, which are driven by a single tooth that can be moved with the result counters
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DE375564C
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Adding machine
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DE384149C
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Device to facilitate the common resetting of the setting levers on calculating machines
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DE395708C
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Axis and shaft support on calculating machines etc. like
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DE359636C
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Adding machine
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DE363312C
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Adding machine
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DE405485C
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Spacer tubes for levers, wheels or the like of calculating machines lined up on an axis with a continuous spring
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DE359635C
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Calculator with laterally pivotable drive teeth
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DE416829C
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Drive wheel with swiveling drive teeth for calculating machines
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DE378836C
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Device for automatic zeroing of the setting means on calculating machines
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