Average Co-Inventor Count = 3.60
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. Yamatake-Honeywell Co., Ltd. (3 from 117 patents)
3 patents:
1. D421791 - Double-seated control valve plug
2. D403049 - Double-seated control valve
3. D403052 - Yoke of valve