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Warwick, RI, United States of America

Karl A Christopherson

Average Co-Inventor Count = 2.77

ph-index = 3

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 = 47

Karl A ChristophersonWebb T Nelson (1 patent)Karl A ChristophersonPaul T Franer (1 patent)Karl A ChristophersonGregory L Gerold (1 patent)Karl A ChristophersonMichael E McGonigle (1 patent)Karl A ChristophersonGregory J Doherty (1 patent)Karl A ChristophersonJoseph J Khan (1 patent)Karl A ChristophersonKarl A Christopherson (3 patents)Webb T NelsonWebb T Nelson (61 patents)Paul T FranerPaul T Franer (35 patents)Gregory L GeroldGregory L Gerold (4 patents)Michael E McGonigleMichael E McGonigle (2 patents)Gregory J DohertyGregory J Doherty (2 patents)Joseph J KhanJoseph J Khan (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hasbro, Inc. (3 from 497 patents)

2. Play Visions, Inc. (1 from 2 patents)


3 patents:

1. 6699096 - Toy with character and vehicle components

2. D432191 - Toy football

3. 6076513 - Trigger operated bow type toy gun

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as of
1/16/2026
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