Average Co-Inventor Count = 2.77
ph-index = 3
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. Nippon Petrochemicals Company, Limited (3 from 327 patents)
3 patents:
1. 5945020 - Laminated heating structure
2. 5759647 - Tubular article method for injection molding thereof
3. 5107953 - Muffler