Growing community of inventors

Faribault, MN, United States of America

Debra M Steffenhagen

Average Co-Inventor Count = 3.00

ph-index = 6

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 = 116

Debra M SteffenhagenErik J Bjornard (6 patents)Debra M SteffenhagenEric William Kurman (4 patents)Debra M SteffenhagenEric R Dickey (2 patents)Debra M SteffenhagenR Russel Austin (1 patent)Debra M SteffenhagenClifford L Taylor (1 patent)Debra M SteffenhagenClifford E Taylor (1 patent)Debra M SteffenhagenDebra M Steffenhagen (7 patents)Erik J BjornardErik J Bjornard (17 patents)Eric William KurmanEric William Kurman (15 patents)Eric R DickeyEric R Dickey (30 patents)R Russel AustinR Russel Austin (51 patents)Clifford L TaylorClifford L Taylor (9 patents)Clifford E TaylorClifford E Taylor (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Viratec Thin Films, Inc. (6 from 31 patents)

2. Other (1 from 832,891 patents)


7 patents:

1. 6068738 - Method and apparatus for thin film coating an article

2. 5688389 - Method and apparatus for thin film coating an article

3. 5620572 - Method and apparatus for thin film coating an article

4. 5489369 - Method and apparatus for thin film coating an article

5. 5450238 - Four-layer antireflection coating for deposition in in-like DC

6. 5407733 - Electrically-conductive, light-attenuating antireflection coating

7. 5372874 - DC reactively sputtered optical coatings including niobium oxide

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as of
12/30/2025
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