Average Co-Inventor Count = 1.00
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. Toho Perlite Kabushiki Kaisha (1 patent)
2. Kabushiki Kaisha Tokyo Landscape Architects (0 patent)
0 patent: