Average Co-Inventor Count = 2.40
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. Sumitomo Gomu Kogyo Kabushiki Kaisha (2 from 14 patents)
2 patents:
1. 4523542 - Paving apparatus for a travelling path for vehicles of guide rail system
2. 4507015 - Arrangement for paving elastic surface material