Average Co-Inventor Count = 4.86
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 42,517 patents)
2. Hitachi Software Engineering Company, Ltd. (1 from 228 patents)
3 patents:
1. 5625757 - Printing system
2. 5590314 - Apparatus for sending message via cable between programs and performing
3. 4542458 - Method of and apparatus for assigning software resources to memory