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. Nittan Company Limited (2 from 77 patents)
2 patents:
1. 6693529 - Fire alarm system
2. 6577233 - Fire alarm system and terminal equipment in the same