Average Co-Inventor Count = 3.00
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.
Company Filing History:
1. Societe Nationale Elf Aquitaine (production) (1 from 215 patents)
2. Compagnie Francaise Des Petroles (1 from 95 patents)
3. Compagnie Generale Pour Les Developpements Operationnels Des Richesses (1 from 38 patents)
4. Ateliers Et Chantiers De Bretagne - A.c.b. (1 from 15 patents)
5. Compagnie Maritime D'expertises (1 from 9 patents)
6. Etudes Petrolieres Marines (1 from 7 patents)
1 patent:
1. 4214692 - Butt-welding apparatus for assembling and laying pipe strings in deep