Average Co-Inventor Count = 4.00
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. Hitachi Koki Co., Ltd. (1 from 1,267 patents)
1 patent:
1. 4778297 - Hammer coil cooling means in line printer