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. Kohan Sendan Kikai Kabushikikaisha (1 from 3 patents)
2. Sasebo Jukogyo Kabushiki Kaisha (1 from 1 patent)
3. Nishi Nippon Harbor Service Kabushiki Kaisha (1 from 1 patent)
1 patent:
1. 4030441 - Device for connecting tugboat with ship to be tugged