Average Co-Inventor Count = 2.03
ph-index = 3
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. Presys. Co., Ltd (8 from 10 patents)
2. Psk Inc. (1 from 29 patents)
8 patents:
1. 10563775 - Vacuum valve
2. 10443741 - Blade for vacuum valve
3. 10352480 - Bidirectional gate valve
4. 10260655 - Angle valve having fixed heater block
5. 10132414 - Vacuum valve
6. 9995402 - Two-way gate valve
7. 8807527 - Door valve
8. 7766305 - Rectangular gate valve