Average Co-Inventor Count = 5.00
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. Obayashi Corporation (1 from 41 patents)
2. Hazama Corporation (1 from 8 patents)
3. Mitsui O.s.k. Lines, Ltd. (1 from 8 patents)
4. Taihei Sangyo Co., Ltd. (1 from 1 patent)
1 patent:
1. 5243834 - Low temperature food storage equipment