Average Co-Inventor Count = 4.00
ph-index = 1
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. Other (1 from 832,680 patents)
2. Hitachi, Ltd. (1 from 42,485 patents)
2 patents:
1. 6288368 - Vacuum heating furnace with tapered portion
2. 6093911 - Vacuum heating furnace with tapered portion