Average Co-Inventor Count = 2.40
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. Izumi Denki Corporation (2 from 16 patents)
2 patents:
1. D255350 - Timing relay
2. D250184 - Pneumatic timing relay or similar article