Average Co-Inventor Count = 11.00
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, Ltd. (1 from 42,517 patents)
2. Echo Co. Ltd. (1 from 4 patents)
1 patent:
1. 5400072 - Video camera unit having an airtight mounting arrangement for an image