Average Co-Inventor Count = 4.14
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. Hitachi, Ltd. (3 from 42,535 patents)
3 patents:
1. 6185481 - Air cooled electronic equipment apparatus
2. D432534 - Computer
3. D293242 - Controller for a point-of-sales system