Average Co-Inventor Count = 9.00
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. Obayashi Corporation (3 from 41 patents)
2. Nichireki Co., Ltd. (3 from 5 patents)
3. Toho Natural Gas Company, Limited (3 from 3 patents)
3 patents:
1. 5891224 - Rubber modified asphalt type of water-proofing compositions
2. 5866211 - Rubber modified asphalt type of water-proofing compositions
3. 5674313 - Rubber modified asphalt type of water-proofing composition