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. Kabushiki Kaisha Iseki Kaihatsu Koki (1 from 48 patents)
2. Toa Grout Kogyo Kabushiki Kaisha (1 from 3 patents)
3. Toa Grout Kogyo Kabushiki Kaishi (1 from 1 patent)
4. Kabushiki Kaisha Iseki (1 from 1 patent)
2 patents:
1. 5224742 - Method for cutting off water in pipeline and structure of connection
2. 5035539 - Liner for pipeline repair and method for repairing pipelines