Average Co-Inventor Count = 2.00
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.
Company Filing History:
1. Den Norske Stats Oljeselskap A.s. (3 from 146 patents)
3 patents:
1. 5442590 - Seismic cable device
2. 5265066 - Seismic cable
3. 5253223 - Seismic device