Average Co-Inventor Count = 3.43
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.
Company Filing History:
1. Ion Geophysical Corporation (2 from 99 patents)
2. Tgs-nopec Geophysical Company (4 patents)
2 patents:
1. 11204365 - Multi-axis, single mass accelerometer
2. 9664807 - Seismic sensor