Average Co-Inventor Count = 2.67
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. Christensen, Inc. (2 from 48 patents)
2 patents:
1. 4098363 - Diamond drilling bit for soft and medium hard formations
2. 4073354 - Earth-boring drill bits