Growing community of inventors

Milford, DE, United States of America

Donald A Kapperman

Average Co-Inventor Count = 5.00

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 = 29

Donald A Kapperman ↔ Paul D Hammesfahr (2 patents)Donald A Kapperman ↔ Steven R Jefferies (2 patents)Donald A Kapperman ↔ Paul A Silver (2 patents)Donald A Kapperman ↔ John Charles Subelka (2 patents)Donald A KappermanDonald A Kapperman (2 patents)Paul D HammesfahrPaul D Hammesfahr (35 patents)Steven R JefferiesSteven R Jefferies (31 patents)Paul A SilverPaul A Silver (11 patents)John Charles SubelkaJohn Charles Subelka (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Dentsply Research & Development Corp. (2 from 217 patents)

2. Dentsply International Inc. (210 patents)

3. Steven R. Jefferies (0 patent)

4. John C. Subelka (0 patent)

5. Donald A. Kapperman (0 patent)

6. Paul D. Hammesfahr (0 patent)

7. Paul A. Silver (0 patent)


2 patents:

1. 6696507 - Dental composite restorative material and method of restoring a tooth

2. 6353040 - Dental composite restorative material and method of restoring a tooth

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as of
12/30/2025
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