Average Co-Inventor Count = 3.00
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. The Secretary of State for Trade and Industry in Her Britannic Majesty's (1 from 15 patents)
2. The Secretary of State for Energy in Her Britannic Majesty's Government (1 from 13 patents)
2 patents:
1. 5301169 - Seismic source
2. 5031719 - Seismic sonde