Average Co-Inventor Count = 3.43
ph-index = 1
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. Mitsubishi Chemical Corporation (2 from 2,347 patents)
2. Alps Electric Co., Ltd. (1 from 4,048 patents)
2 patents:
1. 5972457 - Optical recording medium
2. 5944945 - Thermal transfer device