Growing community of inventors

Corpus Christi, TX, United States of America

Darrell E Fontenot

Average Co-Inventor Count = 4.00

ph-index = 1

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 = 36

Darrell E Fontenot ↔ David Durward Szarka (1 patent)Darrell E Fontenot ↔ Tommie Austin Freeman (1 patent)Darrell E Fontenot ↔ Morris G Baldridge (1 patent)Darrell E Fontenot ↔ T Austin Freeman (1 patent)Darrell E Fontenot ↔ David D Szarka (1 patent)Darrell E FontenotDarrell E Fontenot (1 patent)David Durward SzarkaDavid Durward Szarka (61 patents)Tommie Austin FreemanTommie Austin Freeman (1 patent)Morris G BaldridgeMorris G Baldridge (11 patents)T Austin FreemanT Austin Freeman (5 patents)David D SzarkaDavid D Szarka (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Halliburton Company (1 from 1,479 patents)

2. David D. Szarka (0 patent)

3. Darrell E. Fontenot (0 patent)

4. Morris G. Baldridge (0 patent)

5. Tommie Austin Freeman (0 patent)


1 patent:

1. 4917184 - Cement head and plug

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as of
12/25/2025
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