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 Metals, Ltd. (3 from 2,333 patents)
2. Shimizu Construction Co., Ltd. (2 from 116 patents)
3. Hitachi Metals Techno, Ltd. (1 from 7 patents)
2 patents:
1. 5218802 - Column and beam connecting assembly
2. 5174080 - Column and beam connecting assembly