Growing community of inventors

Elk Grove, IL, United States of America

Arthur S Zerfahs

Average Co-Inventor Count = 1.71

ph-index = 4

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 = 45

Arthur S ZerfahsNorman Diamond (2 patents)Arthur S ZerfahsKirk D Hoffman (1 patent)Arthur S ZerfahsLarry E Zack (1 patent)Arthur S ZerfahsEdward C Jupa (1 patent)Arthur S ZerfahsRobert J Jurin (1 patent)Arthur S ZerfahsAaron Aronson (1 patent)Arthur S ZerfahsArthur S Zerfahs (6 patents)Norman DiamondNorman Diamond (7 patents)Kirk D HoffmanKirk D Hoffman (5 patents)Larry E ZackLarry E Zack (3 patents)Edward C JupaEdward C Jupa (2 patents)Robert J JurinRobert J Jurin (1 patent)Aaron AronsonAaron Aronson (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. General Signal Corporation (2 from 786 patents)

2. Other (1 from 832,891 patents)

3. Synergetics, Inc. (1 from 51 patents)

4. General Railway Signal Corporation (1 from 19 patents)

5. Qonaar Corporation (1 from 14 patents)


6 patents:

1. 6102387 - Automated sheet dispenser

2. 5225665 - Ticket originating and processing device for transit vehicle

3. 5089694 - Card reader device having automatic means for clamping the card to be

4. 4453667 - Bill transport system for a farebox

5. 4145911 - Temperature sensitive liquid column measuring and calibrating apparatus

6. 4094104 - Finishing machine

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1/1/2026
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