Average Co-Inventor Count = 4.20
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. H. Ikeuchi & Co., Ltd. (2 from 9 patents)
2. Nippon Kokan Kabushiki Kaisha (1 from 487 patents)
2 patents:
1. 5193746 - Self-cleaning nozzle
2. 4646977 - Spray nozzle