Average Co-Inventor Count = 5.62
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. Matsushita Electric Industrial Co., Ltd. (3 from 27,375 patents)
3 patents:
1. 6835270 - Process and apparatus of producing optical disk and process of producing substrate
2. 6416609 - Process and apparatus of producing optical disk and process of producing substrate
3. 6258433 - Optical recording medium