Average Co-Inventor Count = 4.80
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. Seikosha Co., Ltd. (2 from 696 patents)
2 patents:
1. 5124959 - Hour chime clock
2. 4993006 - Device for turning decoration for timepiece