Average Co-Inventor Count = 3.43
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. Diafoil Company, Ltd. (2 from 59 patents)
2 patents:
1. 4990400 - Polyester films, magnetic recording media and film capacitors produced
2. 4781963 - Magnetic recording medium