Growing community of inventors

Somerville, NJ, United States of America

Norman A Levin

Average Co-Inventor Count = 1.50

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 = 75

Norman A LevinLeonard L Kaplan (2 patents)Norman A LevinNorman A Levin (3 patents)Leonard L KaplanLeonard L Kaplan (6 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Johnson & Johnson Gmbh (3 from 511 patents)


3 patents:

1. 4155868 - Enzyme and active oxygen containing denture cleanser tablet

2. 3976601 - Water soluble lubricant for tabletting compositions

3. 3962107 - Enzyme-containing denture cleanser tablet

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as of
12/18/2025
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