Average Co-Inventor Count = 1.50
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. Texaco Inc. (1 from 3,161 patents)
2. Dresser Oil Tools Division of Dresser Industries, Inc. (1 from 1 patent)
2 patents:
1. 6142224 - Triple action pumping system with plunger valves
2. 5899270 - Side intake valve assembly