Average Co-Inventor Count = 2.67
ph-index = 4
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. Petroleum Geo-Services Asa-Norway (2 from 2 patents)
2. Abb Atom Ab (1 from 83 patents)
3. Unaco Systems Ab (1 from 3 patents)
4 patents:
1. 5959939 - Electrodynamic driving means for acoustic emitters
2. 5757728 - Acoustic transmitter
3. 5757726 - Flextensional acoustic source for offshore seismic exploration
4. 5329499 - Acoustic transmitter