Growing community of inventors

Englewood, OH, United States of America

David F Christofferson

Average Co-Inventor Count = 4.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 8

David F ChristoffersonRobert A Bryson, Sr (1 patent)David F ChristoffersonJohn N Hobbs (1 patent)David F ChristoffersonAl Baglyos (1 patent)David F ChristoffersonDavid F Christofferson (1 patent)Robert A Bryson, SrRobert A Bryson, Sr (7 patents)John N HobbsJohn N Hobbs (3 patents)Al BaglyosAl Baglyos (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Am International Incorporated (1 from 191 patents)


1 patent:

1. 5203549 - Collator with printer having inclined printing path and displaceable

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as of
12/21/2025
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