Average Co-Inventor Count = 3.16
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. Tajima Ryokka Incorporated (2 from 2 patents)
2. Bridgestone Corporation (1 from 5,124 patents)
3 patents:
1. 8225546 - Plant cultivation structure, root-preventing structure and root-preventing sheet used in them
2. 7637056 - Planting device and planting structure for plants
3. 4830693 - Method for forming a tire around a bead