Average Co-Inventor Count = 4.00
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. Hitachi, Ltd. (2 from 42,485 patents)
2. Hitachi Computer Engineering Co., Ltd. (2 from 56 patents)
2 patents:
1. 5615316 - Printing control method and apparatus
2. 5379368 - Printing control method and apparatus