Average Co-Inventor Count = 4.00
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 42,488 patents)
3 patents:
1. 4551996 - Washing machine with drier
2. 4507942 - Washing machine with drier
3. D271815 - Combined electric washer and clothes dryer