Growing community of inventors

Northridge, CA, United States of America

David P Hanefeld

Average Co-Inventor Count = 4.00

ph-index = 2

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 = 38

David P HanefeldJames A Helzer (2 patents)David P HanefeldAlan I Green (1 patent)David P HanefeldMax A DeHerrera (1 patent)David P HanefeldJulia J Souther (1 patent)David P HanefeldVance P Mattison (1 patent)David P HanefeldDwight Hayes (1 patent)David P HanefeldDavid P Hanefeld (2 patents)James A HelzerJames A Helzer (5 patents)Alan I GreenAlan I Green (16 patents)Max A DeHerreraMax A DeHerrera (2 patents)Julia J SoutherJulia J Souther (2 patents)Vance P MattisonVance P Mattison (2 patents)Dwight HayesDwight Hayes (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (1 from 832,843 patents)

2. Unicover Corporation (1 from 8 patents)


2 patents:

1. 6394499 - Self-adhesive stamp construction

2. 5191972 - Storage and display device for coins and the like

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as of
12/28/2025
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