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Helffrich; David J.
Bethlehem, PA
No. of patents:

Patent Number Title Of Patent Date Issued
4959795 Insertion machine with distributed chargeback September 25, 1990
In a document insertion machine, third-party advertising documents are fed from downstream insert stations (36, 37, 38, 39). The third party insert stations include an optional insert station (39) from which documents are to be fed only if the additional weight occasioned by the feeding

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