Average Co-Inventor Count = 5.87
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 Koki Co., Ltd. (3 from 1,267 patents)
2. Hitachi, Ltd. (2 from 42,517 patents)
3 patents:
1. 5062723 - Printing apparatus
2. 5061092 - Multicolor thermal printer recording medium transmission mechanism
3. D319654 - Line printer for electronic computer