Average Co-Inventor Count = 4.00
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. Ebara Corporation (4 from 2,508 patents)
4 patents:
1. 5727929 - Exhaust apparatus and vacuum pumping unit including the exhaust apparatus
2. 5480286 - Exhaust apparatus and vacuum pumping unit including the exhaust apparatus
3. 5326227 - Exhaust apparatus with vacuum pump
4. 5240381 - Exhaust apparatus and vacuum pumping unit including the exhaust apparatus