Average Co-Inventor Count = 4.56
ph-index = 4
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. Hitachi High-tech Corporation (5 from 1,134 patents)
2. Hitachi-high-technologies Corporation (1 from 2,874 patents)
6 patents:
1. 12442455 - Gas supply apparatus, vacuum processing apparatus, and gas supply method
2. 12224158 - Plasma processing apparatus
3. D924824 - Ion shield plate base for semiconductor manufacturing apparatus
4. D901407 - Integrated type ion shield for semiconductor manufacturing apparatus
5. D900760 - Ion shield plate for semiconductor manufacturing apparatus
6. D864885 - Infrared lamp heater transmission window for semiconductor manufacturing apparatus