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. Hewlett-packard Company (2 from 9,638 patents)
2 patents:
1. 4578687 - Ink jet printhead having hydraulically separated orifices
2. 4509062 - Ink reservoir with essentially constant negative back pressure