Average Co-Inventor Count = 5.00
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. Hitachi, Ltd. (2 from 42,508 patents)
2. Toyota Jidosha Kabushiki Kaisha (1 from 36,713 patents)
3. Hitachi Instrument Engineering Co., Ltd. (1 from 18 patents)
2 patents:
1. 4939365 - Automatic preliminary irradiation apparatus in transmission electron
2. 4439999 - Absorption type refrigeration system