Average Co-Inventor Count = 3.43
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. Kubota Corporation (1 from 2,667 patents)
2. Gas Research Institute (1 from 645 patents)
2 patents:
1. 5505898 - Plastic pipe and manufacturing method thereof
2. 5462314 - Electro-fusion fitting having a solid embedded heater with perpendicular